Three unidentified men dressed in police coats beat a man to death in southeast Moscow on Tuesday, a law enforcement source said.

"The attackers beat the man with batons and then disappeared. He died of his injuries at the scene," the source told RIA Novosti, adding that the attack happened near some shops just after midnight.

Information about the attackers was given to all vehicle- and foot-patrol officers in the district and the scene was examined by investigators, but the perpetrators were not found.

Police corruption has long been a concern in Russia, and the issue was highlighted earlier this month when an officer in southern Russia posted a video on the internet accusing his superiors of corruption.

Maj. Alexei Dymovsky was dismissed after a Novorossiisk police department investigation found his claims to be groundless, but his statement - directed at Prime Minister Vladimir Putin - prompted several other law enforcement personnel across Russia to make similar claims.

MOSCOW, November 24 (RIA Novosti)