ROUGH CUT (NO REPORTER NARRATION)<br/> <br />STORY: Pro-Russian separatist protesters seized control on Sunday (April 13) of the mayor's office in the town of Mariupol, eastern Ukraine, on the Azov Sea.<br/> <br />The protesters entered the building following a rally involving about 1,000 people demonstrating in favor of the creation of a separate republic in eastern Ukraine, a local journalist for the newspaper Priazovsky Worker said.<br/> <br />The police did not try to stop them as they entered the offices, took down the Ukrainian flag and erected barricades outside the building.<br/> <br />The United Nations Security Council will meet for an emergency session to discuss the escalating crisis in eastern Ukraine at 8 p.m. New York time on Sunday (0 GMT Monday).<br/> <br />Russia's Foreign Ministry said earlier it would put an urgent discussion of the situation in Ukraine on the Security Council agenda, calling Kiev's plans to mobilize the army to put down a rebellion by pro-Russian militants in eastern Ukrai
