WATCH LIVE: Russia Puts Nuclear Forces on High Alert After Invading Ukraine From Sky News

Watch Sky News live: Vladimir Putin has ordered that Russia’s nuclear deterrent forces are put on high alert, saying aggressive statements by NATO leaders and economic sanctions against Moscow were behind the decision.

Meanwhile; The UK has announced further sanctions on Moscow, while Britons have been advised against all travel to Russia; a further 100,000 Ukrainians will be able to seek sanctuary in the UK, the home secretary has announced; and dozens of people have been killed in mass shelling in Kharkiv, the Ukrainian interior ministry says, as fierce fighting continues into the fifth day of the conflict.