
Oleksiy Arestovych, an adviser in Ukrainian President Volodymyr Zelensky's office, says that the Russian bombardment of the southern city of Mariupol has now caused more than 2,500 deaths.
"Our military is succeeding there -- yesterday they defeated another attempt at an armored breakthrough in Mariupol, took prisoners of war," he said Monday.
"But for this the Russians are wiping the city out.
"More than 2,500 people have been killed, according to official reports from the city authorities. And this is a catastrophe to which the world has not given a proper assessment," Arestovych added.
CNN cannot independently verify these casualty figures.
Dire situation: Mariupol's city administration confirmed Sunday that a large convoy of humanitarian aid destined for the besieged city had not arrived, and was still stuck in Berdyansk, some 50 miles to the west. Berdyansk is held by Russia forces. A resident of Mariupol also painted a grim picture of the situation in the city.