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Russia says EU 'against peace' as US backs new sanctions

The Russian Foreign Ministry said the European Union has "made its choice against" a peace process in Ukraine by approving tougher sanctions against Russia.

President Barack Obama said the United States will join the EU in imposing sanctions on Russia's financial, energy and defence sectors after Moscow sent troops into eastern Ukraine last month.

David Cameron has spoken to European leaders and agreed to push ahead with the sanctions by the end of the week, his spokesman has confirmed.

After the announcement the Russian rouble reached a new historic low against the dollar.

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Canada's response to Russian border 'mistake' goes viral

The Canadian delegation to Nato has come up with this response to reports that Russian troops entered Ukraine "by mistake".

The sarcastic tweet, which attracted claims that Canada has "trolled" Russia, has been re-tweeted more than 17,000 times.

On Tuesday, an unnamed Russian security source was quoted as saying the incursion was a "mistake" - a claim contradicted by Ukraine which says the troops have attacked the eastern town of Novoazovsk.

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