Georgian armed units attacked and overran Ossetian and Cossack positions early on Thursday, blaming the opponents for the nightly gunfire that is increasing tension in the region, Georgian Interior Minister Irakly Okruashvili told Rustavi 2 TV company by phone.He said eight Cossacks were found dead on the seized heights. \"Information about the enemy\'s casualties is being updated, and the death rate may be even higher,\" he said. He said Cossacks left behind many weapons, uniforms and food in their retreat. (Interfax)