Russia Says Ukraine Failing to Halt Extremists Seeking Civil War

Russia accused the Ukrainian government of failing to rein in extremists as escalating tensions threaten to undermine a diplomatic accord reached last week and stoke calls in the U.S. for economic sanctions.

Ukrainian and Russian officials traded accusations about responsibility for attacks that killed three during the weekend. Foreign Minister Sergei Lavrov in Moscow called on the U.S. to hold the Ukrainian authorities accountable for observing the agreement signed in Geneva, which calls for all illegal groups to disarm and seized buildings to be returned.