Seven Ukrainian soldiers have been killed in the past 24 hours, a military spokesman has confirmed.
Earlier the military said Ukrainian paratroopers were fighting a Russian tank battalion in a bid to hold onto the airport outside Luhansk, a separatist stronghold on the border with Russia.
But military spokesman Andriy Lysenko said Ukrainian forces have now pulled back from the airport after being ordered to do so.
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.