Cameron offers more Typhoons for Nato air mission

Britain will offer another two Typhoon warplanes to patrol the skies of eastern Europe amid continuing tensions with Russia over the Ukraine cris, David Cameron has said.

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Obama to discuss Ukraine with key European leaders

President Barack Obama said he will talk to key European leaders later today about the Ukraine crisis and stated he may be ready to impose sectoral sanctions if Russia escalates the situation.

Speaking in the South Korean capital Seoul, Obama said he will use the conversation to "make sure they share my assessment in terms of what's happened since the Geneva talks took place".

US President Barack Obama speaking in the South Korean capital Seoul. Credit: RTV

US officials have grown increasingly impatient with what they describe as Russia's failure to live up to its commitments in an agreement reached in Geneva earlier this month to try to de-escalate the crisis in Ukraine.

The US is also frustrated at the reluctance of some European nations, notably Germany and Italy, to impose a new round of economic sanctions on Russia.

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