Russia, U.S. Trade Blame as Ukraine Accord Nears Collapse

``The agreement signed in Geneva by Ukraine, the European Union, the U.S. and Russia on April 17 calls for all illegal groups to give up their arms and return seized buildings. Pro-Russian forces held their ground in several eastern cities, as their leaders denied they were bound by the accord. The government in Kiev has said Russia is behind the unrest, exploiting the situation to prepare a potential invasion.''