Ukraine accuses Russia of "waging war"Listen /
Ukraine has accused Russia of "waging war" after pro-Russian militants took control of government buildings in the east of the country.
It follows a period of unrest which began when the region of Crimea voted to secede from Ukraine and join the Russian Federation.
An emergency meeting of the UN Security Council was called late on Sunday evening to discuss the crisis.
Daniel Dickinson reports from UN Headquarters in New York.