dissenting:
Appellant, the Commonwealth,1 contends that the lower court erred in granting appellees’ motion to suppress evidence. According to the Commonwealth, the search warrant of February 10, 1976 contained sufficient probable cause to justify its issuance.2 I disagree and, therefore, would affirm the lower court.
*489Appellees were charged with three counts each of theft of movable property,3 theft by receiving stolen property,4 criminal mischief,5 criminal conspiracy,6 and possession of motor vehicles with defaced serial numbers.7 On May 14,1976, the Montgomery County Court of Common Pleas granted appellees’ motion to quash the informations charging theft of movable property and theft by receiving stolen property, but denied the motion to quash the remaining charges.
On May 13, and July 12, 1976, appellees filed motions8 to suppress evidence obtained as a result of all searches of the Old Mill property. At a suppression hearing on July 21, 22, and 23, 1976, the Commonwealth presented the following facts.
*490In December of 1975, Trooper John T. Hennessey of the Pennsylvania State Police received information from a confidential informant described only as “a concerned citizen who is a respected member of the community.” The informant stated that “criminal activity was [taking place] at a large warehouse located in Salford Station, Montgomery County, Penna. . . . Several new trucks and motor vehicles were seen being taken into the building and bright lights and smoke being emitted from the shop as though the vehicles were being dismantled.” The property, known locally as the Old Mill, was located near the intersection of Quarry Road and Salford Station Road in Upper Salford Township, Montgomery County.
Pursuant to this information, the police began a surveillance of the property which continued until they obtained a search warrant on February 10, 1976. The building under surveillance was a two story green cinder block and wood frame structure located parallel to an unused railroad right of way on which the rails and ties had been removed sometime before the initial surveillance began. Appellee Rovanna Best-Bey leased the premises from its owner. The building had bathrooms on the first and second floors, and an office area in the front of the building. Although one room was panelled, there was no furniture in any of the rooms.
The initial police surveillance was conducted from the railroad right of way which could be used as a road. From that vantage point, Trooper Hennessey observed and noted the license plate number of a GMC truck which was parked on the railroad right of way. A subsequent check of records through the use of a computer print-out indicated that the truck was registered in the name of appellee Rovanna Best-Bey.
On January 5, 9, and 16, 1976, Trooper Hennessey, accompanied by other troopers, returned to the Old Mill property at night without a search warrant. On these occasions, the police obtained vehicle identification numbers (VINs) from parts of motor vehicles located outside, but close to the *491building. They obtained the VINs by opening a door to a truck cab and lifting a canvas covering a pile of engines. The police used flashlights to observe and record the VINs; they then seized several of the engines. They did not observe vehicles being taken into the building, smoke being emitted from the building, or any bright lights. Trooper Hennessey testified that the officers came onto the property at night primarily in order to avoid detection. Although the property was not surrounded by a fence, it was not open to the public.
On February 10, 1976, a police officer recited the following information in the probable cause section of an application for a search warrant of the Old Mill:
“On or about 22 Dec 75, reporting officer was contacted by a confidential informant who related that criminal activity was taking place at a large warehouse located in Salford Station, Montgomery County Penna. The informant stated that several new trucks and motor vehicles were seen being taken into the building and bright lights and smoke being emitted from the shop as though the vehicles were being dismantled. The informant stated that the building was located parallel to the Reading Railroad tracks approximately 500 feet from the intersection of Quarry Rd., and Salford Station Rd., in Salford Station, Upper Salford Twp., Montgomery County Penna.
“On 1 Jan 76, reporting officer accompanied by Sgt. Daniel MONKIEWICZ., proceeded to Salford Station, Penna., and observed a building, green in color at the above mentioned location. The building is a two story rectangular building. The bottom half is cinder block with a wood frame upper half. The building has a part metal roof and part roofing shingles. The property is owned by one Geoffery LAUGHERY.
“Salford Station R., Salford Station Penna. A registration number was obtained from the G.M.C. truck, silver enclosed box, parked on the old railroad bed. The number was Penna. CK90933. The vehicle was registered to Rovanna BEST 3125 Natrona St., Philadelphia Penna. A criminal *492records check was made with the Philadelphia Police Department. The subject BEST has a criminal record involving a large number of arrests for theft of motor vehicles, receiving stolen property and related offences. His last arrest is listed as 12&128/74,13 counts of theft of motor vehicles etc. The subject’s correct name is Rovanna Best BEY. A check with the Motor Vehicles Bureau revealed that the subject has 12 vehicles registered to him in the name of Rovanna BEST. The subject also is in possession of a Pennsylvania Operators License in the name of Rovanna BEST.
“On 9 Jan 76, reporting officer and Tpr. Albert DeSTEFANO, P.S.P. conducted a surveillance of the building known as the Old Mill. VIN number F10YEP85341 was obtained from a green Ford Truck, 1972 model, issued to Petrellis 719 Crestview St., Philadelphia, Penna., reported stolen on 9/8/75., from the city of Philadelphia, Penna.
“On 16 Jan 76, a surveillance of the Old Mill was conducted by Tprs. Richard PREBULA, and David MOTKO. a VIN number was obtained from a motor and transmission which was located behind the G.M.C. Truck on the old railroad bed under a canvas cover.8® The number was 6L47S4Q423194. The vehicle, a 1974 Cadillac was reported stolen from the King of Prussia Shopping Center, Upper Merion Twp., Montgomery County Penna., on 12/24/75. The owner of the vehicle is one Joseph R. PEARL of CURTI Dr., Southampton, Penna.
“On 10 Jan 76, reporting officer contacted informant who stated that a Cadillac vehicle arrive at the Old Mill on a flat bed truck. The vehicle was parked outside of the building for several days and then taken inside. The vehicle was not seen again. The informant stated that smoke was emitted from the vent system of the building indicating that cutting or burning was being done inside of the building. *493“On 2 Feb 76, the subject BEST was observed leaving the ‘Old Mill’ with a red dump truck. The vehicle was loaded with automobile parts, mostly fenders and assorted body parts.
“On 6 Feb 76, the subject BEST was again observed leaving the area operating a red dump truck again loaded with automobile body parts.
“On 9 Feb 76, the subject BEST and another black male were observed leaving the warehouse with automotive parts loaded on the back of a 1967 Ford Tk., bearing Penna. registration CL47520. the vehicle is issued to Rovanna BEST. . . .
“The informant is a concerned citizen who is a respected member of the community.”
Based upon this information, the magistrate issued a search warrant for the Old Mill on February 10, 1976. The magistrate issued six subsequent search warrants for the Old Mill premises which the police executed on the following dates: February 11, 12, 18, 26, March 16, and 19, 1976. All subsequent warrants specifically incorporated the probable cause recited in the initial warrant.
Upon execution of the initial search warrant on February 10, 1976, appellees Vernon Mayes, Tyrone Elwood Scott, and Nathaniel Best-Bey were found on the Old Mill premises and arrested. Appellee Rovanna Best-Bey was arrested at a later date. At the conclusion of the hearing on July 23, 1976, the lower court granted the motion to suppress and the Commonwealth’s appeal followed.
The Commonwealth contends that the lower court erred in suppressing evidence obtained pursuant to the February 10, 1976 search warrant and all subsequent warrants. According to the Commonwealth, the February 10, 1976 warrant alleged sufficient probable cause to justify its issuance. Appellees, however, respond, and the lower court so found, that the February 10, 1976 warrant did not allege sufficient probable cause because: (1) much of the information alleged in the warrant stemmed from illegal police surveillance of *494appellees’ leased premises and this could not be considered in determining probable cause, and (2) the remainder of the information in the warrant did not sufficiently establish probable cause under the standards of Aguilar-Spinelli. I will first analyze whether the lower court erred in refusing to consider all the information obtained as a result of the allegedly illegal pre-February 10, 1976 surveillance. After I make this determination, I will evaluate whether the remaining information in the February 10,1976 warrant sufficiently established probable cause.
The Commonwealth first contends that the pre-February 10, 1976 surveillance was not illegal because the appellees did not have a reasonable expectation of privacy on the Old Mill premises. In Katz v. United States, 389 U.S. 347, 351, 88 S.Ct. 507, 511, 19 L.Ed.2d 576 (1967), the United States Supreme Court stated that “. . . the Fourth Amendment protects people not places. What a person knowingly exposes to the public, even in his own home or office, is not a subject of Fourth Amendment protection. But what he seeks to preserve as private, even in an area accessible to the public, may be constitutionally protected.” (Citations omitted). See also U.S. v. Rubin, 343 F.Supp. 625 (E.D.Pa.1972), vacated, 474 F.2d 262 (3d Cir. 1973), cert. denied Agran v. United States, 414 U.S. 833, 94 S.Ct. 173, 38 L.Ed.2d 68 (1973); Commonwealth v. Strickland, 457 Pa. 631, 326 A.2d 379 (1974); Commonwealth v. Cooper, 362 Pa.Super. 1041, 362 A.2d 1041 (1976). Consequently, “. . . once it is established that an individual is where he has a reasonable expectation of privacy, he is entitled to be free from unreasonable intrusions by the government.” Commonwealth v. Swanger, 453 Pa. 107, 110, 307 A.2d 875, 877 (1973) (Citations omitted). “The test of any search, anywhere, any time, is the Fourth Amendment. This Constitutional mandate is premised, not upon the general character of the place searched, but whether or not the individuals had a reasonable expectation of privacy.” (Emphasis in the original). United States v. Rubin, supra, at 628. Thus, the Fourth Amendment’s safeguards extend to premises occupied for *495business or commercial purposes as well as to those occupied for residential or dwelling purposes. Kroehler v. Scott, 391 F.Supp. 1114 (E.D.Pa.1975); United States v. Wolfe, 375 F.Supp. 949 (E.D.Pa.1974); United States v. Zarra, 258 F.Supp. 713 (M.D.Pa.1966). Moreover, “absence of a physical intrusion does not per se demonstrate that a police search was reasonable . . . .” Commonwealth v. Soychak, 221 Pa.Super. 458, at 462, 289 A.2d 119, 122 (1972). If an individual’s reasonable expectation of privacy is violated, the intrusion is unreasonable and violative of the Fourth Amendment’s safeguards, notwithstanding the absence of a physical intrusion.
“The Fourth Amendment does not prohibit warrantless searches, but rather unreasonable searches.” United States v. Samuels, 374 F.Supp. 684, 685 (E.D.Pa.1974). What constitutes a reasonable search cannot be determined by a fixed formula, but rather must be based on the facts and circumstances of each particular case. Ker v. California, 374 U.S. 23, 83 S.Ct. 1623, 10 L.Ed.2d 726 (1963); Commonwealth v. Soychak, supra. Although an evaluation of the entire context surrounding a search may reveal exigent circumstances which render a warrantless search reasonable, “ ‘searches conducted outside the judicial process, without prior approval by judge or magistrate, are per se unreasonable under the Fourth Amendment — subject only to a few specifically established and well-delineated exceptions.’ The exceptions are ‘jealously and carefully drawn,’ there must be ‘a showing by those who seek the exemption * * * that the exigencies of the situation made that course imperative.’ ‘[T]he burden is on those seeking the exemption to show the need for it.’ ” Coolidge v. New Hampshire, 403 U.S. 443, 454-55, 91 S.Ct. 2022, 2032, 29 L.Ed.2d 564 (1971) (Citations and footnotes omitted).
Applying these principles to the facts of the instant case, I conclude that the police surveillance of appellee’s leased property constituted a warrantless, unreasonable search which violated appellees’ reasonable expectation of privacy. After receiving the “tip” from the anonymous informant, *496the police officers made no attempt to enter the building on the Old Mill premises until obtaining a search warrant on February 10, 1976. However, they conducted a nocturnal surveillance of the premises on at least six separate occasions during a six week period by coming onto the Old Mill property, observing the activities of appellees as they entered and exited the building, and looking into windows. Moreover, the officers obtained VINs by shining flashlights under a canvas which covered engine parts. Although the property was not surrounded by a fence, there was no indication that appellees knowingly exposed the property to the public such as to avoid the Fourth Amendment’s protections. Commonwealth v. Cooper, supra. Finally, Trooper Hennessey conceded that the police conducted their surveillance at night in order to avoid detection. Thus, had the police though the premises were open to the public, they would not have found clandestine entry to be necessary.9 In sum, I conclude that appellees’ reasonable expectation of privacy was violated by the warrantless, nighttime entry on the Old Mill premises. Consequently, the information obtained as a result of the illegal surveillance cannot constitute a basis for probable cause.
The Commonwealth’s next contention is that even if we refuse to consider the information obtained as a result of the surveillance, the information which the police received from the informant provided sufficient probable cause to justify the issuance of the search warrant. I conclude that the information fails to satisfy either prong of the Aguilar-Spinelli test.
“ ‘. . . [A] magistrate’s determination of probable cause justifying the issuance of a warrant must be supported by an affidavit [and, if necessary, sworn testimony] that discloses the underlying circumstances from which the *497affiant has concluded that his information is reliable and that it must contain a statement of the underlying circumstances “to enable the magistrate independently to judge of the validity” of the affiant’s conclusion that the things to be seized are where he says they are.’ United States v. Bailey, 458 F.2d 408, 411 (9th Cir. 1972) (quoting from Spinelli, supra [393 U.S. 410] at 413, 89 S.Ct. [584] at 587, [21 L.Ed.2d 637]) (emphasis added).
“Although the information supplied the magistrate ‘. . . must be tested with a commonsense, nontechnical, ungrudging, and positive attitude, . . . ’, Rosencranz v. United States, 356 F.2d 310, 314 (1st Cir. 1966); United States v. Ventresca, 380 U.S. 102, 108-69, 85 S.Ct. 741, 746, 13 L.Ed.2d 684 (1965), the information must be sufficient ‘. . .to enable the magistrate independently to judge of the validity of the informant’s conclusion that the narcotics were where he said they were.’ Spinelli, supra at 413, 89 S.Ct. at 587 (emphasis added).” Commonwealth v. Simmons, 450 Pa. 624, 629, 301 A.2d 819, 822 (1973).
Although hearsay information supplied by an anonymous informer may provide probable cause, Draper v. United States, 358 U.S. 307, 79 S.Ct. 329, 3 L.Ed.2d 327 (1959), there must be two additional types of information before probable cause can be established. First, in order to assure that the informer’s information is not merely an unsupported rumor, the affiant must know the underlying circumstances from which the informer concluded that the suspect participated in the crime. Second, in order to reduce the possibility that a tip meeting the first standard is not merely a well-constructed fabrication, the affiant must have some reasonable basis for concluding that the informant was credible and reliable. Spinelli v. United States, 393 U.S. 410, 89 S.Ct. 584, 21 L.Ed.2d 637 (1969); Aguilar v. Texas, 378 U.S. 108, 84 S.Ct. 1509, 12 L.Ed.2d 723 (1964); Betrand Appeal, 451 Pa. 381, 303 A.2d 486 (1973); Commonwealth v. Simmons, supra. Thus, “a search warrant may not constitutionally issue upon an affidavit which fails to set forth substantiating facts and *498circumstances from which the magistrate might make an independent and detached appraisal of the probability that a crime had been or was being committed.” Commonwealth v. Swierczewski, 215 Pa.Super. 130, 257 A.2d 336 (1969).
Applying this two-part test to the facts of the instant case, it becomes apparent that there was no probable cause to support the issuance of the February 10, 1976 search warrant. First, the required underlying circumstances to support the informant’s conclusion that criminal activity was occurring are absent. The tip came from an unidentified informant who did not demonstrate personal knowledge of any criminal activity. Rather, the informant’s tip was a mere conclusion that “criminal activity was [taking place] at a large warehouse in Salford Station, Montgomery County,” and that “several new trucks and motor vehicles were seen being taken into the building and bright lights and smoke being emitted from the shop as though the vehicles were being dismantled.” This statement is nothing more than a mere suspicion of criminal activity which is, in itself, insufficient to sustain the issuance of a warrant. Com. v. Simmons, supra. Further, the affiant failed to either recount the manner in which the informant obtained his information or to describe the alleged criminal activity in detail based on personal observation, in order to provide supporting factual circumstances for the informer’s tip. Commonwealth v. Samuels, 235 Pa.Super. 192, 340 A.2d 880 (1975). The police officer did not observe bright lights or smoke or any evidence of criminal activity on the premises to corroborate the informant’s conclusion. Finally, even if the warrant recited any details corroborating a conclusion of criminal activity, any information obtained as a result of police surveillance prior to the issuance of the warrant could not provide substantiation for the informant’s tip because such information was the result of an illegal search. Because the warrant lacks the requirement of underlying circumstances to support the informant’s conclusion, the warrant fails to satisfy the first part of the Aguilar-Spinelli test.
*499Second, the warrant failed to present a reasonable basis from which the affiant could conclude that the source of the information was reliable. The warrant stated only that “the informant is a concerned citizen who is a respected member of the community.” Neither the warrant nor a supporting affidavit demonstrated any indicia of reliability, such as personal knowledge of the informant, past reliability, or corroborating sources, to support the informant’s tip. Commonwealth v. Samuels, supra. Thus, the record is devoid of any underlying circumstances providing a reasonable basis to believe that the informant himself was a credible person and not merely an individual fabricating a story. Consequently, the second part of the Aguilar-Spinelli test is also lacking.
Because the February 10, 1976 warrant fails to satisfy the two-pronged Aguilar-Spinelli test, and because we refuse to consider the information obtained as a result of the illegal surveillance, I conclude that the warrant lacks the requisite probable cause to justify its issuance. All the subsequent warrants specifically depended upon the probable cause recited in the initial warrant. Although inclusion of illegally obtained evidence will not invalidate a search warrant if the warrant is also based upon other valid sources sufficient to constitute probable cause, United States v. Sterling, 369 F.2d 799 (3d Cir. 1966), Commonwealth v. Soychak, supra, the subsequent warrants in the instant case do not present any additional sources constituting probable cause. Therefore, the lower court correctly suppressed all evidence obtained during searches of the Old Mill on or after February 10, 1976.
In conclusion, I would hold that the Commonwealth violated appellees’ Fourth Amendment rights by intruding upon appellees’ reasonable expectation of privacy and by failing to provide sufficient probable cause to justify the issuance of a valid search warrant. Accordingly, I would affirm the lower court’s suppression order.
I dissent.
. I note that “[t]he Commonwealth may only appeal from a pre-trial order if it involves a pure question of law and if it effectively terminates or substantially handicaps a prosecution.” Com. v. DeFelice, 248 Pa.Super. 516, 522, 375 A.2d 360, 363 (1977). See also Commonwealth v. Ray, 448 Pa. 307, 292 A.2d 410 (1972); Commonwealth v. Bosurgi, 411 Pa. 56, 190 A.2d 304 (1963). In the instant case, the Commonwealth meets the requirements necessary to appeal from a suppression order. First, the Commonwealth appeals from a pure question of law: the lower court’s finding that the Commonwealth violated appellees’ Fourth Amendment rights by intruding upon appellees’ reasonable expectation of privacy and by failing to provide sufficient valid probable cause to justify the issuance of a search warrant. Second, the suppression order effectively terminated or substantially handicapped the Commonwealth’s prosecution. The lower court suppressed the evidence obtained pursuant to the February 10, 1976 warrant because the warrant did not contain sufficient probable cause. The lower court further suppressed evidence obtained as a result of all subsequent warrants because they were based on the initial illegal warrant. Moreover, the lower court suppressed all evidence obtained as a result of the illegal surveillance of the property. As the record demonstrates, the Commonwealth lacks any additional evidence on which to base its prosecution. Thus, the prosecution is effectively terminated or substantially handicapped as a result of the suppression order.
. In its brief the Commonwealth also alleges that the lower court erred in granting the suppression order because; (1) if a portion of the probable cause section of a search warrant is based on illegally *489obtained evidence, the lower court must look to other paragraphs of the probable cause section to determine whether there are other valid sources independently sufficient to constitute probable cause, (2) the items observed by the police which are not named in the search warrant were obtained lawfully as the fruits or evidence of a crime, (3) any minor defect in the warrant or affidavit does not justify the remedy of suppression absent a showing of prejudice to the appellees, and (4) the warrants subsequent to February 10, 1976, contained sufficient probable cause without reference to the initial warrant of February 10, 1976, to justify their issuance. The Commonwealth did not raise any of these issues in its answer to appellees’ motion to suppress or in New Matter and the lower court never had the opportunity to consider these arguments. Accordingly, these contentions are waived. Pa.R.App.P. 302(a); see also Commonwealth v. Curtis, 253 Pa.Super. 163, 384 A.2d 1280, n. 6 (1977); Commonwealth v. Clair, 458 Pa. 418, 326 A.2d 272 (1974).
. The Crimes Code, Act of December 6, 1972, P.L. 1482, No. 334, § 1, eff. June 6, 1973; 18 Pa.C.S. § 3921.
. The Crimes Code, supra; 18 Pa.C.S. § 3925.
. The Crimes Code, supra; 18 Pa.C.S. § 3304.
. The Crimes Code, supra; 18 Pa.C.S. § 903.
. The Vehicle Code, Act of April 29, 1959, P.L. 58, § 301; 75 P.S. § 301. Since the date of the alleged offense, the Vehicle Code has been thoroughly revised. For the present analogue to 75 P.S. § 301, see The Vehicle Code, Act of June 17, 1976, P.L. 162, Act No. 81, eff. July 1, 1977; 75 Pa.C.S. § 7102.
. The lower court granted appellees’ motion to consolidate filed on July 13, 1976.
a. The concurring opinion construes this ambiguous sentence to mean that the vehicle parts were located on the railroad right of way. At the suppression hearing, the affiant testified to the contrary that the vehicle parts were located outside, but near the house. Moreover, a defendant may attack an affidavit on the basis of misstatement of material facts. Commonwealth v. Wiggins, 239 Pa.Super. 256, 361 A.2d 750 (1976).
. The Commonwealth does not allege the existence of any exigent circumstances to justify the warrantless search. Although in part of its brief the Commonwealth attempts to argue that the evidence was legally seized because it was in plain view, the Commonwealth waived this argument by failing to raise it in its answer to appellees’ motion to suppress. See footnote 2, supra.