William Wise Murray petitions for a writ of mandamus. He seeks an order for immediate release from confinement on the ground that the government failed to prove at trial that he used a sawed-off shotgun during the commission of an armed robbery.

*672 Mandamus relief is available only when the petitioner has a clear right to the relief sought. See In re First Fed. Sav. & Loan Assn., 860 F.2d 135, 138 (4th Cir. 1988). Further, mandamus is a drastic remedy and should only be used in extraordinary circumstances. See Kerr v. United States Dist. Court, 426 U.S. 394, 402, 96 S.Ct. 2119, 48 L.Ed.2d 725 (1976); In re Beard, 811 F.2d 818, 826 (4th Cir. 1987). Mandamus may not be used as a substitute for appeal. See In re United Steelworkers, 595 F.2d 958, 960 (4th Cir. 1979).

The relief sought by Murray is not available by way of mandamus. Accordingly, although we grant leave to proceed in for-ma pauperis, we deny the petition for writ of mandamus. We dispense with oral argument because the facts and legal contentions are adequately presented in the materials before the court and argument would not aid the decisional process.

PETITION DENIED.