Meanwhile, the president of Ukraine has rebuked Joe Biden for a gaffe which was described as an “invitation for Putin to invade”.
“We want to remind the great powers that there are no minor incursions and small nations,” Zelesnky said on Thursday.
“Just as there are no minor casualties and little grief from the loss of loved ones. I say this as the President of a great power.”
At a White House press conference on Wednesday, Biden said he now believed that Vladimir Putin will “move in” on Ukraine, and reiterated warnings that such an attack would have “disastrous” consequences for Russia.
But he added: “It’s one thing if it’s a minor incursion, and we [in Nato] end up fighting about what we should do, not do.”