Via the BBC:
http://www.bbc.co.uk/news/world-europe-26572530US Secretary of State John Kerry and Russian counterpart Sergei Lavrov are preparing for key talks on Ukraine in London, as a disputed referendum in Crimea looms on Sunday.
Mr Kerry is expected to warn Mr Lavrov that the referendum and Russia's military intervention in Crimea could trigger concerted US and EU sanctions.
He has warned of "very serious steps" if Russia annexes the region.
Russia insisted at the UN on Thursday it did "not want war" with Ukraine.
During an emergency meeting of the Security Council, Moscow's ambassador to the UN Vitaly Churkin defended the right of Crimea, which is predominantly ethnic Russian, to decide whether or not to join the Russian Federation.
Russia's military intervention followed the fall of Ukraine's pro-Moscow President Viktor Yanukovych on 22 February.
'Serious steps'
BBC diplomatic correspondent James Robbins says that London is now the stage for a revival of Cold War tensions.
The American and Russian foreign ministers will meet at the US ambassador's residence in central London.
Our correspondent says they will have very different accounts of events in Ukraine.
Mr Kerry will try to persuade Russia that it risks paying a heavy price in political and economic damage from American and European measures which could be triggered by Sunday's referendum.
More at link, but mostly a rehash of what we already know.
