'We are on the brink of disaster': Ukraine PM

Ukraine's Prime Minister Arseniy Yatsenyuk warned Sunday his crisis-hit country was on the "brink of disaster", accusing Russia of declaring war in a bleak appeal to the international community.

"This is the red alert, this is not a threat, this is actually a declaration of war to my country," he told reporters in English, a day after Russia's parliament approved the deployment of troops to Ukraine.