At least 42 people were killed in street battles between supporters and opponents of Russia in southern Ukraine that ended with pro-Russian protesters trapped in a flaming building, bringing the country closer to war.
Russia's War Against Ukraine
Reuters: Dozens killed in Ukraine riot and fire; OSCE monitors freed
Armed men in military fatigues stand guard in front of a regional administrative building seized last night by pro-Russian separatists in the eastern Ukrainian city of Kostyantynivka on April 28, 2014.