Aerial footage released by Ukraine Azov Battalion today shows the destruction of the besieged city of Mariupol in southeastern Ukraine.

Heavy bombardment has left some 400,000 Mariupol inhabitants with no running water or heating and food running short.

More than 2,100 residents have been killed since the Russian invasion, according to the city authorities.

Ukraine and aid agencies have warned that Mariupol faces a "humanitarian catastrophe".