Russia's Foreign Minister Sergei Lavrov has called for "urgent measures for preventing an impending humanitarian catastrophe" in Ukraine during a telephone call with US counterpart John Kerry, his department says.
A statement from the Russian Foreign Ministry said Kerry "confirmed such work is being carried out with the Kiev authorities".
The statement follows reports that Ukrainian forces had surrounded the rebel-held city of Donetsk in the east of the country.
More top news
If the budget is dull that may not be good for May, as this government is in need of a "narrative" - other than the chaos of Brexit talks.
If you need to give an ancient structure a repair, there's a man in South Wales who will be happy to take your call.
Olivia's mum is to marry her fiance this weekend, and the couple are dedicating every detail of the day to Olivia.