Official says Mariupol hasn't fallen: Zelenskyy cautions against Russia's impending manoeuvres. Ukraine live updates

Ukraine President Volodymyr Zelenskyy warned on Sunday that Russia's war on his nation is far from done, and that the world should be on the lookout for Russian President Vladimir Putin's probable use of nuclear and chemical weapons.

"Every country in the world ought to be concerned," Zelenskyy said on CNN's "State of the Union," referring to a series of Easter Sunday interviews focused primarily on Russia's invasion of Ukraine.

President Joe Biden's visit to Ukraine would be welcomed, Zelenskyy added, and he hopes the president would continue to help his troubled country.

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According to him, the war's outcome may be determined by Ukraine's ability to resist.