It's now three and a half weeks since Russia invaded Ukraine and launched a full-scale war.
The targeting of residential areas by Vladimir Putin's forces has prompted in excess of three million Ukrainians to flee their homes, with thousands of people killed or wounded. Shelling and aerial bombardments have caused widespread damage.
Follow our live blog below for Sunday's latest developments and watch our live TV coverage in the video player above.
Ukrainian President Volodymyr Zelenskyy said early Sunday the siege of the port city of Mariupol would go down in history for what he said were war crimes committed by Russian troops.
“To do this to a peaceful city, what the occupiers did, is a terror that will be remembered for centuries to come,” Zelenskyy said in a video address to the nation.
He added that peace talks with Russia were still needed although they were "not easy and pleasant".
The Ukrainian military says Russian forces concentrated on reinforcing supplies on Saturday. Fighting was still reported in many areas. In Mariupol Russian troops pushed deeper into the city.
Zelenskyy said the Ukrainian front line was "simply littered with the corpses of Russian soldiers", a claim that cannot be confirmed.
Good morning. This is Alasdair Sandford with Sunday's latest updates.
For a summary of Saturday's developments in the war Russia launched by invading Ukraine, click here.
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