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US warns Russia 'costs will rise' unless peace deal agreed

The White House said President Barack Obama urged Russian President Vladimir Putin in a phone call to agree to a peace deal.

"If Russia continues its aggressive actions in Ukraine, including by sending troops, weapons, and financing to support the separatists, the costs for Russia will rise," the White House statement added.

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Ukraine seeking a 'swift and unconditional ceasefire'

Ukraine's President Petro Poroshenko has said he hopes talks with his Russian, French and German counterparts on Wednesday will result in a "swift and unconditional ceasefire".

A statement said that a conference call with the three leaders this morning had made some progress.

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