Elsewhere in the world, US President Joe Biden dedicated much of his State of the Union speech to the situation in Ukraine.

Here’s what’s happened overnight:

• Russian troops have parachuted into Kharkiv in the past hour, stepping up an attack on Ukraine’s second-largest city which saw dozens of civilian killings in bombings yesterday
• The smaller southern city of Kherson has also fallen to Russian forces, local Ukrainian officials say.
• US President Joe Biden has banned Russian planes from America’s airspace
• In his State of the Union address, the US president said: “Putin may circle Kyiv with tanks, but he will never gain the hearts and souls of the Ukrainian people”.
• Ukraine’s envoy to the US was given a standing ovation at the address. Oksana Markarova has relayed crucial information to US lawmakers this week – including the claim that Russia has used banned vacuum weapons in warfare
• More than 600,000 people have fled Ukraine so far says the UN
• Boeing and ExxonMobil became the latest Western companies to cut ties with Russia
• Meanwhile, the nation of Belarus, a Russian ally, has doubled its troops on Ukraine’s northern border. Russian forces in the north have been dedicated to the campaign on Kyiv.