Ukraine: US and Russia to hold key talks
5 March 2014 Last updated at 08:04 GMT
US Secretary of State John Kerry and Russian Foreign Minister Sergei Lavrov are due to hold crucial talks to try to ease tensions over the Ukraine crisis.
It follows a warning from President Obama to Russia to move its troops in the Crimea region back to their bases.
Russia says that it has a right to defend its citizens in Ukraine.
Andy Moore reports