Ukraine's President Petro Poroshenko has said that he believes the crisis in the east of the country is very close to the point of "full-scale war".
He said that EU leaders agreed to prepare new sanctions against Russia, which could be implemented depending on the progress of his peace plan.
He added that he hopes a meeting with Russian amd EU representatives on Monday can bring about a ceasefire.
Were the Russians -as Barack Obama claims - weighed down by sanctions, or where the Ukrainians looking to cut their losses?
The new president of the European Council could be "very important" for David Cameron.