"This is not a bluff." Vladimir Putin orders Russia’s first military mobilisation since World War Two and says Russia, which is one of the largest nuclear powers, would use "all the means at [its] disposal" if its territory were threatened. | Channel 4 News

Russia launched more than 120 missiles overnight damaging critical infrastructure during freezing winter weather. Although Ukrainian officials say most of the missiles were shot down, there were explosions in Kyiv, Kharkiv, Lviv and Odesa. Paraic O'Brien reports. | Channel 4 News