US Secretary of State John Kerry is meeting Russian Foreign Minister Sergey Lavrov in London at this hour.<br /><br />It is the latest attempt to solve the crisis in Ukraine before its southern Crimea region votes in Sunday's referendum on whether to join Russia. <br /><br />And tension is growing in Ukraine ahead of that vote, with one person reported killed in confrontation between pro and anti-Russia demonstrators in the eastern city of Donetsk.
