Euronews - The Ukrainian Prime Minister says he is to step down.

Ukraine urged the European Union on Thursday to stay united in keeping up sanctions pressure on Russia over the conflict in eastern Ukraine, as EU leaders gathered for a two-day summit.Ukrainian Prime Minister Arseniy Yatsenyuk said that Russian President Vladimir Putin is trying to divide Europe over Ukraine and that this would be a "disaster for the free world."

Ukraine's latest allegations that Russian troops have been deployed into Ukraine are "complete rubbish," the Russian Defense Ministry said Tuesday.A day earlier, Ukrainian Prime Minister Arseniy Yatsenyuk said Russian troops had crossed the border to support pro-Russian rebels.