DONETSK - Ukraine's president vowed vengeance in blood after 19 troops were killed in an insurgent rocket attack on July 11, and residents of the rebel-held city of Donetsk began fleeing in large numbers for fear of a government siege.
Russia's War Against Ukraine
Associated Press: Eastern Ukrainians flee as army suffers losses
People buy train tickets at the railway station of Donetsk, on July 11, 2014.
