The severed legs of a suicide bomber (bottom) are seen at the site of two bomb attacks in Kizlyar March 31, 2010. Suicide bombers killed at least 12 people in Russia's North Caucasus on Wednesday, two days after deadly attacks in Moscow that authorities linked to insurgents from the region. A car packed with explosives blew up as police gave chase, and a bomber in a police uniform set off a second blast in a crowd of police who rushed to the scene, authorities said. REUTERS/S.Dal (RUSSIA - Tags: POLITICS CIVIL UNREST IMAGES OF THE DAY)