ROSTOV-ON-DON, October 12 (RIA Novosti) - Two Russian soldiers have been killed and two injured in an ongoing counterterrorism operation in Russia's volatile southern republic of Ingushetia on Monday, a law-enforcement source said.

Earlier it was reported that six suspected militants had been killed during the operation.

Restrictions were imposed in five populated areas of Ingushetia's Sunzhensky district, near the border with Chechnya, as part of the counterterrorism operation.

Ingushetia, one of Russia's poorest regions and situated in the mainly Muslim North Caucasus, has been hit by a series of high-profile attacks on troops, police and other officials recently. Violence has been linked to separatists in neighboring Chechnya and local inter-clan rivalry.