Russian President Vladimir Putin
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Vladimir Putin calls Barack Obama to discuss Ukraine

28 March 2014 Last updated at 23:07 GMT

Russia's Vladimir Putin has telephoned President Barack Obama to discuss the US proposal for a diplomatic solution to the crisis in Ukraine, the White House has said.

Mr Obama suggested that Russia put a concrete response in writing, his spokesman said in a statement.

According to the Kremlin, Mr Putin suggested examining how the situation could be stabilised.

The BBC's Mark Mardell reports.