Powers push for ceasefire, weapons withdrawal in eastern Ukraine

By John Irish and Andrea ShalalMUNICH (Reuters) - Germany, France, Russia and Ukraine agreed on Saturday to use their influence to implement a ceasefire and the withdrawal of heavy weapons from Monday in eastern Ukraine.Fighting has recently escalated between Ukrainian forces and Russian-backed separatists in the region, refocusing global attention on a simmering conflict that has strained relations between Russia and the West."On Feb. 20 the ceasefire regime will start and withdrawal of heavy m