Richard S. Pehler, a Minnesota state prisoner, brought this action in the District Court pursuant to 42 U.S.C. § 1983 for declaratory and injunctive relief from the effects of a detainer lodged against him by the State of Louisiana and to have that detainer declared void and unenforceable. The District Court denied Pehler’s motion for a preliminary injunction, holding that Pehler’s claim was in the nature of a habeas corpus claim. Pehler appeals from that order.

After serving three years of a nine-year sentence for attempted murder, Pehler was released on parole from the Louisiana Angola Penitentiary in October, 1972. He was paroled to the State of Minnesota pursuant to the Interstate Compact for the Supervision of Parolees and Probationers. See Minn.Stat.Ann. § 243.16. On June 7, 1973, while in Minnesota and on such parole, Pehler was convicted on a state charge of unauthorized use of a motor vehicle and was incarcerated in the Minnesota State Prison at Stillwater under a three-year sentence.

On June 15, 1973, Louisiana issued and subsequently lodged with Minnesota State Prison officials a parole violation detainer. During 1973 and 1974, Pehler made repeated demands for disposition of the detainer to the departments of correction of both states. Finally, on April 24,1974, Minnesota personnel conducted a preliminary revocation hearing as mandated by Morrissey v. Brewer, 408 U.S. 471, 92 S.Ct. 2593, 33 L.Ed.2d 484 (1972),1 on behalf of the Louisiana department. Although the Minnesota authorities found probable cause to revoke parole on August 29, 1974, and so notified the Louisiana authorities, neither state acted thereafter to provide a final revocation hearing as required by Morrissey. On September 11, 1975, two days following the District Court’s order denying a preliminary injunction, Pehler was discharged by Minnesota authorities into the custody of Louisiana state authorities. Pehler’s Notice of Appeal was filed on September 19, 1975.

Pehler’s amended complaint undeniably asserts that the Louisiana detainer was having adverse effects upon the conditions of his confinement in Minnesota.2 To the extent that he sought relief from such adverse conditions by restraining Minnesota authorities from treating him differently *972from other prisoners solely upon the basis of the detainer without a prompt revocation hearing by Louisiana authorities, Pehler brought himself squarely within our holding in Cooper v. Lockhart, 489 F.2d 308 (8th Cir. 1973); and the District Court therefore had jurisdiction to hear that part of Pehler’s complaint under 42 U.S.C. § 1983. Whether, on the other hand, the District Court erred in denying the preliminary injunction we need not now decide, for plainly under Cooper the transfer of Pehler to Louisiana on September 11, 1975, terminated the adverse conditions of confinement, if any, in Minnesota and rendered that issue moot. Id. at 311.

This does not end the question, however, because Pehler also sought injunctive relief to prevent the State of Louisiana from revoking his parole in view of its recalcitrance in granting him a prompt revocation hearing. Pehler asserts that the Minnesota District Court has jurisdiction to award injunctive relief because it has acquired personal jurisdiction over the Minnesota authorities whom he claims are agents of Louisiana under the Interstate Compact. Minnesota denies such agency and disputes jurisdiction.

The additional injunctive relief sought by Pehler would place him on the street under renewed parole and would preclude revocation of his parole based upon the Minnesota conviction.3 We agree with the District Court that this relief must be characterized as challenging the “fact or duration” of confinement and as such may only be raised by Pehler in a habeas corpus action under 28 U.S.C. § 2254. See Preiser v. Rodriguez, 411 U.S. 475, 93 S.Ct. 1827, 36 L.Ed.2d 439 (1973). Since it is clear that the exhaustion of state remedies required under Section 2254(b) has not been attempted, it is obvious that the balance of Pehler’s complaint, however liberally construed, cannot be maintained in federal court at this time.3

Although this appeal is on the narrow issue of the denial of a preliminary injunction, the present mootness of the Section 1983 claim and the absence of jurisdiction under the habeas corpus claim are so apparent that further hearings are unnecessary. We therefore remand this case to the District Court with instructions to dismiss the Section 1983 claim as moot and to dismiss the habeas corpus claim without prejudice to Pehler’s right to refile in an appropriate jurisdiction4 5 upon exhaustion of his state remedies.