Vladimir Putin put Russia’s nuclear forces on high alert during a fourth day of bloody fighting in Ukraine on Sunday as the west stepped up its efforts to punish Moscow for starting Europe’s biggest military offensive since 1945.
Putin’s move came after US and western allies agreed to impose sanctions on the Russian central bank and eject a group of the country’s lenders from the Swift messaging system — which is crucial for global payments — in some of the toughest such measures taken against a G20 economy.
Nato and the US condemned Moscow’s decision, which the Biden administration described as a “totally unacceptable” escalation.
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