Celebrations have been taking place in Moscow to mark the annexation of four regions of Ukraine.
Thousands of people gathered in Moscow's Red Square last night for a concert to celebrate Vladimir Putin's signing of treaties covering four areas in Ukraine, despite having no legal basis.
Vladimir Putin declared "they have become our citizens forever" - but western allies regard the takeover as illegal.
Volodymyr Zelenskyy says anyone involved in organising the votes will be held accountable.
New sanctions have since been imposed on Russia.
