MOSCOW, May 4 (RIA Novosti) - A police officer was killed and three others were injured when militants opened fire on their cars in Russia's North Caucasus republic of Chechnya, a police source said on Monday.
The incident occurred late on Sunday in southern Chechnya's Achkhoi-Martan region. "The police officers were forced to return fire," the source said.
The attackers fled the scene, and the search for them is continuing.
Two weeks ago the Kremlin announced a formal end to its 10-year counter-terrorism operation in the troubled region.
