The battle for control of a prosecutors office in Eastern Ukraine.<br/> <br />Pro-Russian protesters storm the office Thursday in the separatist-held city of Donetsk.<br/> <br />They accuse the office of working for the Western-backed government in Kiev.<br/> <br />The city of about 1 million people is at the center of an armed uprising across the steel and coal belt by mainly Russian-speakers threatening to secede from Ukraine.<br/> <br />(SOUNDBITE) (Russian) PRO-RUSSIAN ACTIVIST, SERGEI, SAYING:<br/> <br />"The building of the Prosecutor's Office is under our control. Under our control, under the people's control".<br/> <br />The violence underscores the shifting security situation and suspicions in the region.<br/> <br />Inside separatists walk the hallways now under their control.<br/> <br />Ukraine's leaders conceded Wednesday they were "helpless" to counter the fall of government buildings.<br/> <br />Pro-Russian separatists have declared the city a "People's Republic" and say they will hold a referendum on secession on M
