An armed pro-Russian separatist from the so-called Battalion Vostok (East) attaches a flag to an armoured transport before deploying from a base in the eastern Ukrainian city of Donetsk, July 10, 2014. Ukrainian forces regained more ground but sustained further casualties on Thursday in clashes with separatists, while two Western allies urged Russia's Vladimir Putin to exert more pressure on the rebels to find a negotiated end to the conflict. REUTERS/Maxim Zmeyev (UKRAINE - Tags: POLITICS CIVIL UNREST MILITARY CONFLICT)