Russia may use chemical and biological weapons in Ukraine, US President Biden says - BBC New

US President Biden believes Russia's Vladimir Putin's "back is against the wall", warning he may use chemical or biological weapons in Ukraine.

Mr Biden also said that intelligence indicated a growing Russian cyber threat to the US. He said Russia was "exploring" cyber attack, but the US would use "every tool" to prevent and respond to such a move.

Mr Biden suggested Moscow could act in retaliation for sanctions imposed on it after Russia's invasion of Ukraine.

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