Russia's Supreme Court on Thursday overturned the acquittal of three suspects in the killing of U.S. journalist Paul Klebnikov, a court spokesman said.

The court, acting on an appeal by prosecutors, ordered a new trial with a new judge, said court spokesman Pavel Odintsov.

Klebnikov, 41, who was editor of Forbes magazine's Russian edition, was gunned down on a Moscow street in July 2004. Two men went on trial on charges of carrying out the killing on behalf of a Chechen separatist who was the subject of a critical book written by Klebnikov, but they and another man on trial on related charges were acquitted by a jury.

The trial was marked by criticism that prosecutors failed to pursue other lines of investigation in the case.

Observers have suggested that Klebnikov may have made powerful enemies because he investigated corruption and sought to shed light on the closed world of Russian business.