People stand on top of burnt-out armoured personal carrier near the city hall in Mariupol, eastern Ukraine May 10, 2014. At least seven people were killed and dozens wounded in clashes in the port city on Friday, two days before a referendum on self-rule that threatens to plunge the country into civil war. REUTERS/Marko Djurica (UKRAINE - Tags: POLITICS CIVIL UNREST TPX IMAGES OF THE DAY)