Ukraine says five government troops battling separatist forces in the east have been killed in one of the worst single days of bloodshed since a cease-fire was declared in February.
Russia's War Against Ukraine
Reuters: 5 Ukrainian troops killed as cease-fire teeters on brink
Armed pro-Russian rebels take part in a Victory day parade rehearsal in Donetsk in the self-proclaimed Donetsk People's Republic on May 5.
