LONDON (Reuters) - The United States and Russia found no middle ground on the Ukraine crisis on Friday, with the Russians saying they would respect an independence referendum in Crimea and the Americans vowing to impose sanctions if they do.
After six hours of talks with Russian Foreign Minister Sergei Lavrov in London, U.S. Secretary of State John Kerry warned of "an even greater response" if Russia, which shipped more troops and armour into Crimea on Friday, increased tensions further by deploying troops into eastern Ukraine.