ROUGH CUT (NO REPORTER NARRATION)<br/> <br />Pro-Russian protesters in the eastern Ukrainian city of Donetsk stormed the regional government building on Sunday (April 6) and replaced the Ukrainian flag on the building with a Russian one.<br/> <br />Around 1,500 protesters who had surrounded the building cheered, chanting "Russia!".<br/> <br />Around 500 police in riot gear cordoned off the building but some protesters got through.<br/> <br />One Ukrainian flag on the building was torn off, another thrown out of the windows.<br/> <br />The hometown of pro-Russian former president Viktor Yanukovich, Donetsk has seen tensions rise, as they have across mainly Russian-speaking eastern Ukraine, since his ouster and the installation of a pro-European government in Kiev.<br/> <br />The east has remained a touchpoint for tensions between Ukraine and Russia, after Yanukovich fled from power and Russia annexed Ukraine's Crimean territory.<br/> <br />Tensions have spilled over into the biggest confrontation between Russia and the W
