Russian President Vladimir Putin is to discuss a peace plan for east Ukraine with the German, French and Ukrainian leaders by phone.

German Chancellor Angela Merkel and French President Francois Hollande are pushing a plan to end bloody fighting between government and rebel forces.
Meeting Mr Putin in Moscow on Friday, they agreed to four-way talks with Ukraine's Petro Poroshenko on Sunday.
More than 5,000 people have been killed in the east since April.
Thousands more have been injured and more than a million have fled their homes.

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Petro Poroshenko: "Every day the number of civilian victims is rising"

Ukraine's military reported continued shelling on Saturday, accusing the rebels of preparing new offensives, while the rebels accused the government itself of attacking along the line dividing their forces.
Mr Poroshenko has called on the West for support up to and including weapons.
He made the plea at a security conference in Munich on Saturday, when he brandished passports that he said were those of Russian troops in Ukraine.
Russia denies intervening directly in eastern Ukraine.

Analysis: Jonathan Marcus, BBC News, Munich
The escalating winter war in Ukraine provides a grim backdrop to the talks in Munich. Behind the scenes here there have been serious efforts to try to breathe life into the peace process.
But in public nobody was pulling any punches. US Vice-President Joe Biden made clear Washington's distrust of the Russians and its determination to "allow Ukraine to defend itself".
Could that mean giving it weapons? That's the way US thinking seems to be going, to the horror of most of its European allies. The German Chancellor Angela Merkel for one spoke out passionately against such a move.
But there's really no new peace plan in the offing, only a revamp of the old one that was never implemented - the Minsk Agreement of last year. If diplomacy fails and President Barack Obama goes ahead with arms deliveries to Ukraine, it may not only divide Nato, but provoke an even more aggressive Russian response.