The United States drew closer to its G7 allies on Friday, overcoming differences, at least momentarily, to back Ukraine's territorial integrity and warn Russia to follow Kyiv in accepting a ceasefire or face possible further sanctions.

Ukraine’s consent to a 30-day ceasefire proposal has handed the Kremlin a difficult challenge at a time when its military has an upper hand in the war.

Zelensky's comments come after Putin agreed fighting must end but any plan must remove the "underlying causes of this crisis".