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Ukraine warns Russia against 'act of aggression' in Crimea

Ukraine's acting president has warned Russia that troop movements outside its naval base in Crimea would be seen as an "act of aggression". Armed men seized regional government headquarters and parliament and the Russian flag is flying from buildings

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Merkel: 'We will do all we can to help Ukraine'

German Chancellor Angela Merkel giving a speech in the Royal Gallery of the Palace of Westminster in London. Credit: Oli Scarff/PA Wire

The latest challenges to attempts to set up a new national government in the capital Kiev were discussed by Mr Cameron and German chancellor Angela Merkel at talks in 10 Downing Street.

Ms Merkel said: 'We will do everything we can in order to support this government that has a tremendously difficult economic situation".

"The issue of the territorial integrity of Ukraine is of central importance to us".

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