Ukraine crisis: Russian intervention 'intolerable' - Hollande

French President Francois Hollande has said that it would be "unacceptable" if Russian soldiers had entered Ukraine to support separatists.

Mr Hollande also said that Europe was facing one of the worst crises since the Cold War.

The Ukrainian government says Russian forces have crossed the border and a pro-Russian rebel leader in eastern Ukraine has said 3-4,000 Russian citizens are fighting in their ranks.