This is an appeal from an order granting respondent’s motion for a preliminary injunction during the pendency of an action by respondent to enjoin appellant Liquor Authority from proceeding with a hearing to revoke respondent’s liquor license on charges growing out of the same facts (alleged brib*86cry) which have given rise to a criminal indictment now pending against respondent, and denying appellant’s cross motion to dismiss the complaint.
The facts alleged and asserted by the plaintiff below and on this appeal and undisputed by appellant are that, based upon alleged events occurring on respondent’s premises in Nassau County in June, 1965 and on July 2, 1965, respondent was indicted in that county on charges of gambling and of bribery. Thereafter appellant served notice upon respondent of a hearing to be held June 10,1966 to revoke his liquor license by reason of the alleged acts for which respondent was indicted. At the request of the Nassau County District Attorney the hearing was adjourned on various occasions until February 28, 1967, the District Attorney stating that he did not want his witnesses against respondent to testify at appellant’s hearing until after the trial of the pending indictment. On February 28, 1967, on the representation that the criminal trial was imminent, and upon the request of respondent, appellant’s hearing officer adjourned the hearing for a few months, subject to call on further notice. It was noted at that time that the gambling charge against respondent had been dismissed, leaving only the bribery charge pending in Criminal Court, Nassau County. On May 12,1967 a further notice of hearing by appellant was returnable. Respondent then assured appellant’s hearing officer that the criminal case in Nassau County had been assigned to a trial part and that the trial would occur shortly. Appellant then adjourned the hearing to a “final” date, June 28, 1967, with warning that there would be no further adjournment. Respondent made objection on constitutional grounds before the hearing officer, demanding that in no event should the hearing be held before the criminal trial; and thereafter, on June 16, 1967 respondent instituted this action to enjoin appellant Authority from proceeding with the hearing during the pendency of' the criminal indictment against him. In his complaint he has alleged in effect that it will be a denial of due process of law to him for the hearing by the Authority to be held before the criminal trial; and that he has a constitutional right to remain mute at the criminal trial, but that this will be of no avail to him, if, to protect his liquor license, he must testify before the Authority, and thus make his testimony available to the District Attorney. He also alleged that the criminal trial would be concluded within one or two months, and that therefore the Authority would not be prejudiced by the further delay.
Appellant submits that it is vested with the duty to supervise its licensees and in the public interest to suspend or revoke a *87license held by one who shall ‘ ‘ suffer or permit * * * the licensed * * * premises to become disorderly ” (Alcoholic Beverage Control Law, § 106, subd. 6); and that in the performance of such duty it is authorized and even required to conduct hearings on charges leading to suspension or revocation of licenses (Alcoholic Beverage Control Law, § 119). It contends that it is not for the court to interfere with the Authority’s administrative acts before a determination is made, but only to review its acts thereafter. We agree generally with this contention; but we also recognize that in an appropriate case, to prevent injustice the court is empowered to intervene with respect to the performance of a statutory duty by a public board or authority. (People ex rel. Negus v. Dwyer, 90 N. Y. 402; Barlow v. Craig, 210 App. Div. 716; Matthes v. Collyer, 32 Misc 2d 224; Paliotto v. Town of Islip, 31 Misc 2d 447; Burack v. State Liq. Auth. of State of N. Y., 160 F. Supp. 161; and CPLR 6311.)
Generally, however, a court will not grant a preliminary injunction in the absence of a showing of a clear right to the injunctive relief sought. (See Park Terrace Caterers v. McDonough, 9 A D 2d 113; and 7 Weinstein-Korn-Miller, N. Y. Civ. Prac., pars. 6301.18 and 6301.32.) A plaintiff must do more than allege mere conclusions. In the case at bar respondent has expressed fear of loss of constitutional rights and of prejudice if appellant proceeds with the hearing but there is no satisfactory showing of how he may be injured. The difficulty with respondent’s position is that he asks the court to assume that the Authority will violate his constitutional rights when it conducts the hearing. This we may not do.
To the contrary, upon the facts presented we may properly assume that the Authority will not violate respondent’s constitutional rights. For example, since the gambling charge against respondent in the criminal case has been dismissed, there is no reason why the Authority may not conduct its hearing with respect to that charge without legal objection from respondent. Moreover, even as to the bribery charge, it is clearly within the scope of the Authority’s duties to inquire concerning the particular nature of the charge against respondent and as to whether under the circumstances thereof it should temporarily suspend respondent’s license pending the outcome of the indictment. (See Silver v. McCamey, 221 F. 2d 873, 874 — 875.) Furthermore, respondent has not shown that he has exhausted his rights to protect himself in other ways. No satisfactory explanation is made for the inordinate delay in bringing the case to trial or *88why respondent has not moved to dismiss the indictment for failure to bring it to trial.
It may very well be that should the Authority revoke respondent’s license after a hearing, solely on the basis of the pending bribery indictment, it would constitute a denial of due process of law to respondent, for such precipitate action would not appear to be essential to the public welfare. (See Silver v. McCamey, supra.) Civil actions should not be permitted to prejudice a pending criminal case when such prejudicial action may reasonably be avoided. (See Campbell v. Eastland, 307 F. 2d 478, 487, cert. den. 371 U. S. 955; United States v. Parrott, 248 F. Supp. 196,199-202; Perry v. McGuire, 36 F. R. D. 272; Note: Concurrent Civil and Criminal Proceedings, 67 Col. L. Rev. 1277.) But of course we may not assume nor speculate in advance of action by the Authority that it will thus transgress upon respondent’s constitutional rights.
With respect to the cross motion for dismissal of the complaint we have already indicated that with appropriate allegations such an action may be maintained. Upon the allegations of this complaint and the admitted facts, however, we find that respondent has no such cause of action. Moreover, we hold as a matter of discretion that rarely should an action for relief of the nature sought herein be maintained. In our view an article 78 proceeding will afford all the relief needed. An administrative body cannot compel one to testify in violation of his constitutional rights. If a licensee’s license be revoked on the basis of a determination made in violation of his essential rights of due process, the determination may be reviewed and set aside in an article 78 proceeding. We believe that this is the more expeditious and orderly way in which to deal with such problems.
The order appealed from should be reversed and the motion for a preliminary injunction should be denied upon the law and the facts, and the cross motion to dismiss the complaint should be granted, on the law and the facts and as a matter of discretion, with costs and disbursements to the appellant.