An agreement reached last week to avert wider conflict in Ukraine was faltering as the new week began, with pro-Moscow separatist gunmen showing no sign of surrendering government buildings they have seized. Washington says it will hold Moscow responsible and impose new economic sanctions if the separatists do not clear out of government buildings they have occupied across swathes of eastern Ukraine over the past two weeks. U.S. Vice President Joe Biden was due in Kiev later on April 21.
Reuters: Ukraine peace deal falters as rebels show no sign of surrender
Armed pro-Russian militiants stand guard at a check-point outside the eastern Ukrainian city of Slavyansk, on April 20, 2014.
