Six individuals1 and the Illinois Migrant Council (IMC), a not-for-profit corporation, brought this class action for declaratory and injunctive relief against nine named (including John Doe and Richard Roe) and 35 unknown officials of the Immigration and Naturalization Service (INS). IMC provides supportive services and acts as an advocate for illiterate migrant agricultural workers of Mexican heritage, and the individual plaintiffs are American citizens or permanent residents of Mexican descent. The complaint describes the class as consisting of “all persons of Mexican descent and all Spanish surnamed persons in Illinois.” The 35 unnamed defendants are described as INS agents subordinate to the district director for the Chicago district of INS.2 With the exception of Pilliod, who is a supervisory official of the INS stationed in Washington, D.C.,3 the defendants are assigned to the Chicago district thereof and all are allegedly responsible for the actions complained of.
The complaint alleged that the INS has conducted and will conduct a pattern and practice of harassment (including illegal searches, seizures, arrests, interrogations, detentions and mass raids) against the individual plaintiffs and their class in violation of the First, Fourth and Fifth Amendments. Pursuant to plaintiffs’ motion for a preliminary injunction, the district court held four days of hearings, after which defendants filed a motion to dismiss, which was denied on December 3,1974. Thereafter plaintiffs filed a motion for certification of the above-described class.
On July 29, 1975, the district court entered an extensive memorandum opinion, concluding that plaintiffs were entitled to a preliminary injunction and certifying their class as “all persons of Mexican ancestry or of Spanish surname * * * lawfully present in the Judicial District of Northern Illinois.” Illinois Migrant Council v. Pilliod, 398 F.Supp. 882, 892, 905 (N.D.Ill.1975). We affirm. The opinion contains findings of fact detailing the defendants’ challenged conduct and summarized herein.
The plaintiffs disclosed three street encounters between defendants and four individuals. On September 18, 1974, plaintiffs Sandoval and Montanez were driving in Sandoval’s car to the IMC office in Rochelle, Illinois. As they parked outside the office and were leaving the car, an INS car pulled alongside and the agents got out of their car. When Montanez was asked where he was born, he replied, “Mexico.” He was asked for his identification and produced a satisfactory permanent resident alien card after being threatened otherwise with jail in Chicago. When Sandoval, an American citizen of Mexican descent, was asked to produce identification and refused to do so, the agents said they would have to take him to Chicago and forced him into the back seat of their car. He again refused to produce identification but was ordered out of the car when he implied that he was a U.S. citizen.
During the first week of October 1974, plaintiff Lopez was walking to his office at 19 West Jackson Boulevard in Chicago when he was asked by two strangers if he lived in the area. He responded “No” but that he worked around there. Then he was *1066asked where he was born. When he inquired why he was being interrogated, the agent said he was from the INS and flashed his identification. Lopez then said that he was born in New Mexico. He is an American-born citizen of Mexican descent. At the time, he was attired in boots made in New Mexico, levis, an Illinois shirt, and a Mexican jacket.
Jose Ortiz, a member of the plaintiff class, stated that when he was walking with a friend on September 18,1974, in Rochelle, Illinois, two INS agents stopped them and asked for Ortiz’ papers. He was allowed to leave upon complying.
The district judge also made findings of fact with respect to “area control operations” conducted by the INS in Rochelle and Mendota, Illinois, without search or arrest warrants.
At 4:30 a. m. on September 18, 1974, defendant Theodore Giorgetti, an INS employee, and 32 armed INS agents began simultaneous operations on pre-selected targets in Rochelle. First, they knocked on the unlocked doors and entered two La Hacienda buildings where 55 female employees of the Del Monte Food Company were sleeping. The agents proceeded from bedroom to bedroom, demanding that the women occupants produce their papers. After-wards they left the buildings without making any arrests.
The agents also searched the Del Monte cottages where male immigrant employees resided. The INS agents used essentially the same method of operation in those cottages. When one of the residents, the above-mentioned Jose Ortiz, was unable to produce his green card evidencing legal residency, he was forced to accompany the INS agents on their search and only released when another Del Monte employee assured them that Ortiz’s papers were in order.
At the same time, an INS agent repeatedly kicked on the door of a small farmhouse neay Rochelle occupied by Alonzo Solis, an American citizen migrant worker. The agent tried to force his way into the house but desisted only when the Solis’ child cried and Solis ordered him out. Solis dressed and showed the agent his “certificate” outside the house, whereupon the agent left.
At 5:00 a. m., INS agents also conducted similar operations at Del Monte plants 109 and 110. They questioned everyone who appeared to be of Latin heritage. Two Del Monte supervisors offered no resistance because they believed they had to allow the agents to search the plants.
In Mendota, Illinois, at 8:00 a. m. on September 26, 1974, defendant Giorgetti and 30 agents first went to the Motor Wheel plant. Nineteen employees were interviewed by Giorgetti, ten were arrested and five of the ten were subsequently permitted to return to work. The agents then proceeded to several other industrial targets in Mendota and to hotels, boardinghouses and private dwellings, resulting in the apprehension of 108 illegal aliens, 104 of whom were still in detention at the time of the hearing below.
Based on the foregoing findings, the district court concluded that 8 U.S.C. § 1357(a)(1) does not permit searches of this kind. The statute provides:
“Any officer or employee of the Service authorized under regulations prescribed by the Attorney General shall have power without warrant—
“(1) to interrogate any alien or person believed to be an alien as to his right to be or to remain in the United States; * * *.”
The court ruled that this statute should be construed in a manner consistent with the Fourth Amendment. Relying particularly on United States v. Brignoni-Ponce, 422 U.S. 873, 95 S.Ct. 2574, 45 L.Ed.2d 607, the court held that “a person should not be stopped [by an INS agent] unless the agent reasonably suspects that he or she is an alien illegally in the country.” 398 F.Supp. at 898. Concluding that the plaintiffs had satisfied the usual requirements for the issuance of a preliminary injunction, the court preliminarily enjoined seven named defendants in their official capacities and *1067all persons acting in concert with them from:
“(a) entering houses, dormitories, cottages or other dwellings situated in the Northern District of Illinois which are occupied by plaintiffs or any person of Mexican ancestry or of a Spanish surname who is, will be or has been lawfully present in the Northern District of Illinois, unless they possess a valid warrant to search or arrest, have probable cause to enter without such warrant, or have received permission voluntarily given by one lawfully entitled to give permission to enter;
“(b) arresting, detaining, stopping, and interrogating or otherwise interfering with plaintiffs or any person of Mexican ancestry or of a Spanish surname who is, will be or has been lawfully present in the Northern District of Illinois, unless they possess a valid warrant to search or arrest such person, have probable cause to search or arrest such person without such a warrant, or have reasonable suspicion based on specific articulable facts that such person is an alien unlawfully in the United States.”
This appeal followed.
Justiciability
Defendants first assert that the district court lacked jurisdiction under 28 U.S.C. § 1331 because the controversy is non-justiciable.4 Questions of justiciability are resolved with reference to the Article III command that courts hear only “cases or controversies” and policy considerations seeking to avoid embroiling the federal courts in disputes outside their role in our system of government. Flast v. Cohen, 392 U.S. 83, 97, 88 S.Ct. 1942, 20 L.Ed.2d 947; Poe v. Ullman, 367 U.S. 497, 503-504, 81 S.Ct. 1752, 6 L.Ed.2d 989. The case or controversy requirement demands that the proper parties, in an adversary relationship with one another, place before a court a dispute which is not only capable of decision by reference to judicially ascertainable standards, but also whose resolution is not committed by the text of the Constitution to another branch of the government. Gilligan v. Morgan, 413 U.S. 1, 8-9, 93 S.Ct. 2440, 37 L.Ed.2d 407; Baker v. Carr, 369 U.S. 186, 217, 82 S.Ct. 691, 7 L.Ed.2d 663. Related to these constitutional standards are certain policies of judicial restraint which deter a court from entertaining suits where either resolution of the dispute or the grant of relief would require the court to make administrative or other non-judicial determinations. Rizzo v. Goode, 423 U.S. 362, 96 S.Ct. 598, 46 L.Ed.2d 561, 44 LW 4095, 4098-4099; Powell v. McCormack, 395 U.S. 486, 517, 89 S.Ct. 1944, 23 L.Ed.2d 491.
On the facts presented to the district court, there is clearly a case or controversy. The plaintiffs have standing and are otherwise proper parties because they have alleged “some threatened or actual injury resulting from the punatively illegal action.” O’Shea v. Littleton, 414 U.S. 488, 493, 94 S.Ct. 669, 675, 38 L.Ed.2d 674. Plaintiffs complain of repeated actions by INS officials in stopping members of plaintiffs’ class without legal cause and in conducting illegal searches and seizures of dwelling places and factories. Plaintiffs assert and the district court found that these injuries resulted from a practice and policy of the INS to question individuals about their alienage simply because they appeared to be of Mexican ancestry. 398 F.Supp. at 900-901. Because plaintiffs have shown a specific pattern of conduct, akin to an explicit policy, they have demonstrated a reasonable likelihood of future harm, justifying their request for injunctive relief. Allee v. Medrano, 416 U.S. 802, 809-811, 94 S.Ct. 2191, 40 L.Ed.2d 566; Baker v. Carr, 369 U.S. 186, 226, 82 S.Ct. 691, 7 L.Ed.2d 663; Hague v. CIO, 307 U.S. 496, 59 S.Ct. 954, 83 L.Ed. 1423.
Both plaintiffs and defendants have the requisite personal interest in the outcome of the litigation, the granting or denial of *1068injunctive relief. O’Shea v. Littleton, supra, 414 U.S. at 494, 94 S.Ct. 669. Plaintiffs and members of their class will be subjected to continued injury by the very nature of the policy challenged, viz., the questioning of individuals based on their racial characteristics. The defendants are the individual agents who will execute the questioning and their supervisors, all of whom have the requisite interest in the case.
It is also clear that the dispute is capable of being resolved by applying judicially ascertainable standards. Paraphrasing Baker v. Carr, supra, 369 U.S. at 226, 82 S.Ct. at 715, “the question here is the consistency of [the INS actions] with the [Fourth Amendment].” The courts of the United States regularly enforce the strictures of that provision of the Bill of Rights. United States v. Brignoni-Ponce, supra; Terry v. Ohio, 392 U.S. 1, 88 S.Ct. 1868, 20 L.Ed.2d 889.
We do not understand the defendants to argue that their actions are not subject to judicial review because of Art. I, § 8, els. 3 and 4 of the Constitution. Cf. Gilligan v. Morgan, supra, 413 U.S. at 11-12, 93 S.Ct. 2440. Nor would we accept such an argument. See Laird v. Tatum, 408 U.S. 1, 15-16, 92 S.Ct. 2318, 33 L.Ed.2d 154; Powell v. McCormack, 395 U.S. 486, 519-521, 89 S.Ct. 1944, 23 L.Ed.2d 491.5 Rather, we understand defendants to question “whether protection for the [Fourth Amendment] right asserted can be judicially molded.” Powell v. McCormack, supra, 395 U.S. at 517, 89 S.Ct. at 1961, quoting Baker v. Carr, supra, 369 U.S. at 198, 82 S.Ct. 691. We disagree with defendants’ claim that the court below was not empowered to grant the relief requested in this case. The rationale for limiting judicial interference in the operation of other branches of government is that a court will be required to make decisions on matters over which it has no particular competence and thereby impede the orderly conduct of governmental affairs. This fear is misplaced here. The requested relief, an order enjoining defendants from stopping and searching individuals simply because they are of Mexican appearance or have Spanish surnames, does not involve the court in the internal affairs of the INS. It does not require the agency to undertake any affirmative act, whether by way of instituting new training procedures or promulgating new rules. It simply orders compliance with the Constitution. In such a case, it is immaterial that the injunction runs against the executive branch of the government. *1069Marbury v. Madison, 1 Cranch (5 U.S.) 137, 170, 2 L.Ed. 60; see also Breen v. Selective Service Board, 396 U.S. 460, 90 S.Ct. 661, 24 L.Ed.2d 653; Green v. Connally, 330 F.Supp. 1150 (D.D.C.1971), affirmed sub nom. Coit v. Green, 404 U.S. 997, 92 S.Ct. 564, 30 L.Ed.2d 550. The requested relief, therefore, does not render this case non-justiciable. Hague v. CIO, supra.
The cases relied on by the defendants, Gilligan v. Morgan, supra, and Rizzo v. Goode, supra, are distinguishable. As we noted in Calvin v. Conlisk, 520 F.2d 1, 5 (7th Cir. 1975), vacated and remanded on other grounds, 424 U.S. 902, 96 S.Ct. 1093, 47 L.Ed.2d 307, judicial relief was refused in Gilligan because of a conflict with Art. I, § 8, cl. 16 of the Constitution with respect to the internal training and supervision of the militia. In addition, there was no showing that the members of the plaintiff class were likely to suffer any future harm. Rizzo v. Goode, supra, is also not applicable. As in Gilligan, there was no showing that plaintiffs would suffer any injury which would warrant injunctive relief. Second, in Goode, there was no pattern or practice of illegal action. Only 19 citizens’ constitutional rights may have been infringed there (423 U.S. at 363, 96 S.Ct. at 600), whereas here hundreds have already been improperly accosted by the INS. Thus the risk of a member of the plaintiff class being stopped in violation of the Fourth Amendment is statistically much greater than the risk dealt with in Goode. Judge Marshall’s preliminary injunction imposes no detailed guidelines for INS agents, nor does it spell out any elaborate procedures that might impede that agency’s work. In Goode, by its affirmative decree, the district court was attempting to impose mandatory, comprehensive relief that would supervise the whole procedure for handling citizens’ complaints against police officers even though none of the defendants had deprived the plaintiff classes of any constitutional rights, 423 U.S. at 374, 96 S.Ct. at 606. Here the preliminary injunction, couched in negative terms, does not inject the chancellor into the day-to-day internal affairs or discretionary authority of the INS but merely insures compliance with the Fourth Amendment by those who had participated in the illegal transgressions. Finally, injunctive relief was refused in Goode because under principles of federalism, United States courts should not ordinarily interfere with internal disciplinary affairs of a state agency. 423 U.S. at 378, 96 S.Ct. at 608; see also O’Shea v. Littleton, supra, 414 U.S. at 500, 94 S.Ct. 669.
Preliminary Injunction Tests
By now it is axiomatic that a preliminary injunction will not issue unless the movant establishes: (1) reasonable probability of success at trial; (2) irreparable injury; (3) lack of serious adverse effects on others; and (4) sufficient public interest. Judge Marshall determined that all these requirements had been met. 398 F.Supp. at 903-904. We agree.
As to the likelihood of success on the merits, the warrantless entry of living quarters by law enforcement personnel is of course prohibited by the Fourth Amendment in the absence of reasonableness or probable cause. No witness testified that the INS had procured consent to the warrantless search of the Rochelle and Mendota dwellings. In fact, the Del Monte corporate officials did not even learn of the Rochelle searches until they were under way. This is insufficient. Bumper v. North Carolina, 391 U.S. 543, 548, 88 S.Ct. 1788, 20 L.Ed.2d 797; Schneckloth v. Bustamonte, 412 U.S. 218, 233, 93 S.Ct. 2041, 36 L.Ed.2d 854. Furthermore, those officials could not validly consent to the search of the employees’ rooms. Stoner v. California, 376 U.S. 483, 84 S.Ct. 889, 11 L.Ed.2d 856; Chapman v. United States, 365 U.S. 610, 81 S.Ct. 776, 5 L.Ed.2d 828.6 No probable cause is asserted. Indeed if defendant Giorgetti had
*1070sufficient information to establish probable cause two days before the Rochelle raid and ten days before the Mendota raid (see U.S. Br. 13), he had ample time to procure a search warrant. The Spanish surnames and appearance of Mexican ancestry were insufficient to justify the INS activities. United States v. Brignoni-Ponce, supra, 422 U.S. at 885-886, 95 S.Ct. 2574.
Similarly, under Brignoni-Ponce, the district court was justified in concluding that the street stoppages and interrogations of Lopez, Sandoval, Montanez and Ortiz and successive interrogations of persons in factories violated the Fourth Amendment because these persons were singled out by the INS agents solely because they looked like Mexicans or had Spanish surnames.7 Rightly, racial appearance has never been considered sufficient to justify a search or seizure involved in random stops. See United States v. Brignoni-Ponce, supra, 422 U.S. at 878, 95 S.Ct. 2574. In this case the stops occurred in the absence of trustworthy tips or suspicious behavior. Nor was there any reasonable ground to believe that the persons were armed or dangerous.
The district court held, and we agree, that a street stop is justifiable here only when the INS agent has a “reasonable suspicion based on specific articulable facts that such person is an alien [unlawfully] in the [United States].” United States v. Brignoni-Ponce, supra, 422 U.S. at 884, 95 S.Ct. at 2582.8 Defendants argue that this standard is contrary to law. However, this standard is substantially embodied in a 1969 INS guideline, but unfortunately it is not being followed by INS officers in the field. 398 F.Supp. at 902, 903.
Although defendants claim that the standard conflicts with the breadth of 8 U.S.C. § 1357(a)(1), they conveniently overlook the origin of this standard. Thus in BrignoniPonce, the Supreme Court held that said statute is so circumscribed by the Fourth Amendment that vehicles may be stopped by INS agents only “if they are aware of specific articulable facts, together with rational inferences from those facts, that reasonably warrant suspicion that the vehicles contain aliens who may be illegally in the country.”9 422 U.S. at 884, 95 S.Ct. at 2582.
We do not think that United States v. Martinez-Fuerte,- U.S. -, 96 S.Ct. 3074, 49 L.Ed.2d-, requires a different result. That case held that government agents did not need reasonable suspicion to stop cars at permanent border checkpoints for the purpose of asking occupants about their residence. That ruling is explicitly limited by the Court to those intrusions at permanent checkpoints -U.S. at -, 96 S.Ct. at 3087 because of the limited nature of the intrusion and the regularity of the exercise of authority. - U.S. at-, 96 S.Ct. at 3082-3084. Martinez-Fuerte therefore does not apply either to searches of dwellings (-U.S. at-, 96 S.Ct. at 3084) or street stops of individuals (-U.S. at-, 96 S.Ct. at 3082).10
*1071Plaintiffs also established that defendants’ conduct caused irreparable harm because the wrongs inflicted were not readily measurable in terms of monetary damages and the recovery of damages alone would not insure the cessation of such invasions in the future. Furthermore, the defendants might be insulated from damage suits if they could show their good faith. Wood v. Strickland, 420 U.S. 308, 95 S.Ct. 992, 43 L.Ed.2d 214; Bivens v. Six Unknown Agents of the Federal Bureau of Narcotics, 456 F.2d 1339, 1348 (2d Cir. 1972); Tritsis v. Backer, 501 F.2d 1021 (7th Cir. 1974).
Compelling the INS agents to comply with the dictates of the Fourth Amendment does not impose an improper burden upon them. Almeida-Sanchez v. United States, 413 U.S. 266, 273, 93 S.Ct. 2535, 37 L.Ed.2d 596. We also do not believe that enforcement of the injunction will unduly burden the defendants. The degree of court supervision of defendants’ activities is no greater than that upheld in Allee v. Medrano, supra, and Hague v. CIO, supra. As in those cases, the defendants will still be able to exercise the full breadth of their lawful authority. Allee v. Medrano, supra, 416 U.S. at 814, 94 S.Ct. 2191; Hague v. CIO, supra, 307 U.S. at 517, 59 S.Ct. 954. Further, the injunction requires the court to review only those actions in which defendants allegedly violate plaintiffs’ rights. It thereby avoids the problem, addressed in Rizzo v. Goode, supra, and O’Shea v. Littleton, supra, of attempting to regulate the internal affairs of the agency.11 Finally, the public interest is served by the, preliminary injunction, for otherwise the dragnet practices violating the Fourth Amendment rights of plaintiffs could continue unabated.
Class Certification
The Government next asserts that there was an improper certification of a defective class. In Jenkins v. Blue Cross Mutual Hospital Ins., Inc., 522 F.2d 1235 (7th Cir. 1975), superseded on other grounds, 538 F.2d 164 (7th Cir. 1976) (en banc), this Court held that the denial of class certification is appealable in conjunction with the appeal of the denial of injunctive relief under 28 U.S.C. § 1292(a). See also Wetzel v. Liberty Mutual Ins. Co., 508 F.2d 239, 245 (3d Cir. 1975), certiorari denied, 421 U.S. 1011, 95 S.Ct. 2415, 44 L.Ed.2d 679; 3B Moore’s Federal Practice, ¶23.97 (1974 Supp.); 9 op. cit. ¶110.13[9] (1974 Supp.) and cases cited in Jenkins, supra, 522 F.2d at 1237. The logic of the *1072rule is that the scope of the injunctive relief granted or denied is in large part determined by the class action question. This rule applies as well to the granting of class relief on a request for a preliminary injunction. Therefore we hold that the order certifying a class is appealable.
The defendants contend that the class, consisting of all persons of Mexican ancestry or of Spanish surname in the Northern District of Illinois, is amorphous and ill-defined. However, the class consists of all individuals who by virtue of defendants’ policy are likely to be subjected to the illegal conduct. The district court’s determination, therefore, is not erroneous. Allee v. Medrano, supra, 416 U.S. at 816, n. 10, 94 S.Ct. 2191; Peterson v. Talisman Sugar Corp., 478 F.2d 73, 83 (5th Cir. 1973).
Scope of Preliminary Injunction
Defendants complain that the injunction unduly restricts their ability to stop and question individuals of certain racial characteristics. However, the standard contained in the order, requiring at least a reasonable suspicion for street encounters, complies with the law (supra at pp. 1070-1071). Defendants also contend that the terms of the preliminary injunction are vague and ambiguous because it forbids INS agents to enter homes, dormitories, cottages or other dwellings unless they “have received permission voluntarily given by one lawfully entitled to give permission to enter * However, case law has spelled out who may consent to such searches,12 and guidelines drawn therefrom may be furnished by the INS to its agents. If any serious interpretative problems arise, the district court is capable of resolving them as they occur. If a permanent injunction should ultimately be awarded, the district judge will doubtless endeavor to resolve any serious ambiguities then being raised by defendants before entering the final order. If, unlike the Goode district judge, he instead decides to afford only declaratory relief, INS agents would of course be liable for actions inconsistent therewith in the absence of proof of their bona fides.13 We merely hold that the preliminary injunction is a permissible stopgap until the case can be finally tried.
Judgment affirmed.14
. Two other individual plaintiffs, Ninfa and Rutilio Arteaga, were permitted to withdraw from the action. The Urban Law Institute, Inc. filed an amicus brief supporting the district court’s decision.
. All defendants were originally sued in both their official and individual capacities, but on plaintiffs’ motion the individual allegations were stricken without prejudice to reinstatement.
. Until just before the complaint was filed, Pilliod was Chicago District Director of the INS, later becoming INS Commissioner for Enforcement and stationed in Washington, D.C.
. Since this is a jurisdictional point, it is immaterial that the defendants did not raise justiciability until after filing their notice of appeal.
. The dissent argues that the federal courts lack power to issue the injunction requested here because Congress has plenary authority to exclude aliens. It is true that Congress has such power. It is also true that the INS agents act pursuant to the authority granted by Congress. It is not true, however, as the dissent’s syllogism would have us hold, that the actions of INS officials are beyond judicial review so that we are barred from granting relief. As with any provision of the Constitution which purportedly grants Congress plenary power, whether exercise of that authority is beyond judicial review depends upon the context in which the officer acts. Compare Gilligan v. Morgan, supra, with Laird v. Tatum, supra, 408 U.S. at 15-16, 92 S.Ct. 2318; also United States v. United States District Court, 407 U.S. 297, 318-321, 92 S.Ct. 2125, 32 L.Ed.2d 752; Baker v. Carr, supra, 369 U.S. at 217, 82 S.Ct. 691. This case does not involve the exclusion of an alien from the United States. See Kleindienst v. Mandel, 408 U.S. 753, 765-767, 92 S.Ct. 2576, 33 L.Ed.2d 683. Rather, it involves the legality of INS questioning individuals already present in this country, regardless of whether those individuals are transient aliens,' permanent residents, or natural-born citizens. Congress’ power to exclude aliens cannot be interpreted so broadly as to limit the Fourth Amendment rights of those present in the United States. Consequently, the subject matter of this lawsuit is properly before the district court.
The relief appropriate for violations of plaintiffs’ rights is a question entirely separate from the fitness of the dispute for judicial resolution. Although an extraordinary remedy, injunctive relief against lawless action by the federal executive is warranted under appropriate circumstances. The dissent has no quarrel with this proposition (infra, p. 1074, n.7). Whether such relief should be granted in a specific case depends upon the balancing of traditional equitable considerations. Congress’ plenary power to exclude aliens enters the balancing by cautioning the courts to grant only that relief which does not unduly interfere with the exercise of lawful authority; the injunction issued below does not suffer from this evil (infra, pp. 1069-1071).
. Milyonico v. United States, 53 F.2d 937 (7th Cir. 1931), certiorari denied, 286 U.S. 551, 52 S.Ct. 502, 76 L.Ed. 1287, is not to the contrary. There the owner consented to a search of the premises, and illegal distilling operations were discovered in a rear room. The roomer’s bedroom was not even searched.
. See also United States v. Guana-Sanchez, 484 F.2d 590, 592 (7th Cir. 1973), certiorari granted, 417 U.S. 967, 95 S.Ct. 1344, writ dismissed as improvidently granted, 420 U.S. 513, 95 S.Ct. 1344, 43 L.Ed.2d 361.
. As noted in “Reasonable Suspicion of Illegal Alienage as a Precondition to ‘Stops’ of Suspected Aliens,” 52 Chicago-Kent Law Review 485, 497 (1975):
“While Brignoni-Ponce reserved the question of whether the suspicion must be of illegal alienage since the facts did not require such decision, the language used in the text continued to phrase the standard in terms of illegal alienage.”
The Note agrees with the standard of justification adopted in the preliminary injunction.
. See also Adams, v. Williams, 407 U.S. 143, 92 S.Ct. 1921, 32 L.Ed.2d 612, and Terry v. Ohio, supra.
. We do not, by this discussion, intend to limit the right of INS agents to engage individuals on the street in casual conversations. Because the district court’s order enjoins defendants from “arresting, detaining, stopping and interrogating,” we do not understand its decision to limit the ability of INS agents to conduct casual conversations. We disagree with the Government when it claims that INS agents may ask questions and under threat of detention compel answers about the individual’s right to be in this country. The Government argues that an INS agent may detain an individual on the street on a reasonable suspicion that he is an *1071alien. As the Government concedes, this detention limits the individual’s right to walk away (Br. 92). In accord with the Court of Appeals for the District of Columbia, we hold that when the individual is detained against his will for questioning, the INS agents must have a reasonable suspicion that he is an illegal alien. Au Yi Lau v. Immigration and Naturalization Service, 144 U.S.App.D.C. 147, 445 F.2d 217, 223 (1971), certiorari denied, 404 U.S. 864, 92 S.Ct. 64, 30 L.Ed.2d 108.
The dissent argues that there is no Fourth Amendment violation when an INS agent merely questions an individual about his right to be in this country, relying on Au Yi Lau, supra, and Shu Fuk Cheung v. Immigration and Naturalization Service, 476 F.2d 1180, 1181-1182 (8th Cir. 1973). We do not disagree with this statement of the law. However, as the dissent notes, this rule is applicable only where the individual cooperates with the questioning officer. The dissent does not state what happens if the individual refuses to answer the questions, and consequently does not address what we believe to be a key issue in this case. We note, however, that it would render meaningless the individual’s right to walk away, as recognized by the dissent and Terry v. Ohio, supra, 392 U.S. at 16, 88 S.Ct. 1868, if that refusal were to be then used as grounds to justify detaining the individual. Because Shu Fuk Cheung, supra, also fails to address this issue, it is not in conflict with our decision.
. The dissent is concerned that the threat of contempt will hamper INS agents in conducting investigations. This argument assumes that the district court will be inflexible in its choice of remedies to enforce its order. Surely this will not be the case. Because of the nature of concepts such as “reasonable suspicion” used in the preliminary injunction, the district court would scarcely hold in contempt those agents who act in good faith and who reasonably believe their actions are justifiable. The contempt sanction should be reserved for those instances, such as the dormitory searches in this case, where there is a blatant disregard for Fourth Amendment rights.
. See, e. g., Stoner v. California, supra; Chapman v. United States, supra; Pizzoia v. Watkins, 442 F.2d 284 (5th Cir. 1974).
. Wood v. Strickland, supra.
. The defendants’ motion to suspend the preliminary injunction order during the pendency of the appeal is now denied.