'More than 50 killed' in Donetsk fighting

Pro-Russian rebels have said the death toll during two days of fighting in the eastern Ukraine city of Donetsk has now risen to 50. Ukraine's military launched a strike on rebels who had taken the international airport in the eastern city.

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Obama offers Ukraine president-elect 'full US support'

President Obama congratulated Ukraine's president-elect Petro Poroshenko on his victory and offered the support of the US as he attempts to "unify his country".

Read: Fighting over 'in hours' says new president

A White House statement said Obama congratulated Poroshenko and offered "the full support of the United States as he seeks to unify and move his country forward."

The leaders will talk again next week, the White House said.

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