MOSCOW, October 21 (RIA Novosti) - Two contract servicemen were injured in Chechnya when unidentified militants opened fire on their vehicles, a police source said.

The soldiers were traveling in a truck and an armored vehicle in the North Caucasus republic's Vedeno district on Tuesday.

The attackers "fired with grenade launchers and automatic weapons", the source told RIA Novosti.

Also on Tuesday in the neighboring republic of Ingushetia, militants opened fire on a policeman, but he was not injured in the incident, a local police source said.

The militants shot at the officer's car with automatic rifles as he was approaching his house. He returned fire, and the attackers fled the scene.

Russia's North Caucasus republics, in particular Chechnya, Dagestan and Ingushetia, have seen an upsurge of militant violence this year, with frequent attacks on police and officials.