Ukraine crisis: Russia accused of wanting to start WW3

The war of words over the crisis in Ukraine has deepened after the the country's interim prime minister accused Russia of wanting to start World War Three.

Arseniy Yatsenyuk said Russia was in danger of creating a conflict that would spread to the rest of Europe.

Russian Foreign Minister Sergei Lavrov has accused the West of wanting to "seize" Ukraine for its own ends.

Nick Childs reports.