A portrait of Russian President Vladimir Putin is displayed on a table in the hall of a regional administration building occupied by pro-Russian activists in the eastern Ukrainian city of Luhansk May 17, 2014. Pro-Russian separatist leader Valery Bolotov was detained by Ukrainian border guards on Saturday then freed by armed supporters in a firefight at the checkpoint, a Ukrainian spokesman said. REUTERS/Valentyn Ogirenko (UKRAINE - Tags: POLITICS CIVIL UNREST)