At least one policeman was killed and another wounded after a group of law enforcers came under gunfire on Friday in Russia’s North Caucasus republic of Dagestan, a local police source said. He said unknown assailants set up an ambush and opened fire on a group of policemen near the village of Bairamaul in the Khasavyurt district of the republic. The details of the attack are being established and the search for the assailants has been launched, the source added. More that a decade after the end of a federal war against separatists in Chechnya, militants continue to stage frequent attacks on security forces, police and civilians, in other regions in the area, including Dagestan. Volatile Dagestan, which neighbors Chechnya, saw around half of all militant attacks in Russia last year.