Six gunmen were killed in a special operation in the Kizlyar district of Russia's North Caucasian republic of Dagestan, a spokesman for Russia's National Anti-terrorism Committee said on Saturday. According to the spokesman, several more members of the so-called Kizlyar paramilitary unit were killed in the joint police and security forces operation that has been conducted since May 10 in forests around the village of Tsvetovka. Two light machine guns, four machine guns, two handguns, grenades and cartridges were recovered from the site, Itar-Tass reported.