An injured pro-Russian armed man is helped out of a car by a medical staff at a hospital at the town of Slaviansk, eastern Ukraine, May 5, 2014. Pro-Russian separatists ambushed Ukrainian forces on Monday, triggering heavy fighting on the outskirts of the rebel stronghold of Slaviansk, Interior Minister Arsen Avakov was quoted as saying. REUTERS/Baz Ratner (UKRAINE - Tags: POLITICS CIVIL UNREST TPX IMAGES OF THE DAY)