Joe Biden has said Vladimir Putin "cannot remain in power", appealing to the Russian people against the killing of innocent civilians, and telling Ukraine that the US stands with them.

In a powerful speech in Warsaw, Poland, the US president built on earlier remarks in which he called Mr Putin a "butcher", describing him as "a dictator" and saying stopping the war in Ukraine is "the task of our time".

He said: "Brutality will never grind down the will to be free. Ukraine will never be a victory for Russia."

"For God's sake, this man cannot remain in power," Mr Biden added at the end of his speech.

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