US and Russia spar over Ukraine crisis at UN Security Council

The United States and Russia have sparred over the Ukraine crisis at the UN Security Council, with Washington warning of a 'horrific' war should Moscow decide to invade its neighbour and Russian diplomats playing down the threat of military conflict. US ambassador to the United Nations, Linda Thomas-Greenfield, told the council during a special open session on Monday that a Russian invasion of Ukraine would threaten global security.