Ukrainian troops stand atop of a vehicle as they leave the scene of fighting in Mariupol, eastern Ukraine, Friday, June 13, 2014. Ukraine’s interior minister says that government troops have attacked pro-Russian separatists in the southern port of Mariupol. Arsen Avakov said Friday that four government troops were wounded as forces retook buildings occupied by the rebels in the center of the town. (AP Photo/Evgeniy Maloletka)