The Kremlin says it is "disappointed" the US cancelled talks that were scheduled in September, after Russia granted asylum to intelligence leaker Edward Snowden.

Russian President Vladimir Putin's foreign affairs adviser said the move showed the US could not develop ties with Russia on an "equal basis".

A White House aide said Mr Snowden's asylum had deepened the pre-existing tension between the two counties.

But President Obama still plans to attend the G20 economic talks in St Petersburg.

Mr Snowden, a former intelligence contractor, has admitted leaking information about US surveillance programmes to the media.

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