Russian President Vladimir Putin announced this morning "We have taken the decision to conduct a special military operation, for the demilitarisation and denazification of Ukraine."

He added: "A hostile anti-Russia is being created on our historic lands. We do not intend to occupy Ukraine. To anyone who would consider interfering from the outside: if you do, you will face consequences greater than any you have faced in history. All relevant decisions have been taken. I hope you hear me."

As Putin’s words were being broadcast and the first explosions reported, the UN security council was holding an emergency session, chaired by Russia itself, which holds the rotating presidency. It was begun by the UN secretary general, António Guterres, who made a direct appeal: "President Putin – stop your troops from attacking Ukraine. Give peace a chance. Too many people have already died."

Ukraine’s president Volodymyr Zelenskiy made an urgent national address to the nation in the wake of the Russian declaration of its “special military operation” this morning.

In a brief video address, Zelenskiy said Russia has carried out missile strikes on Ukraine infrastructure and on Ukrainian border guards with explosions being heard in many cities across the country. He has introduced martial law.