Russia’s invasion of Ukraine is in is fourth week, but the city of Mariupol remains under Ukrainian control, despite near-constant bombardment from the Russian forces which surround the city.
On Saturday, the city’s mayor, Vadym Boychenko, told the BBC that street fighting in the city centre is hampering efforts to rescue hundreds of people trapped in the basement of a bombed theatre.
“There are tanks… and artillery shelling, and all kinds of weapons fired in the area,” the mayor said.
The humanitarian situation in the city is critical. It has no electricity, gas or water, and supplies of food and medicine are running out.
Elsewhere in Ukraine, a Russian attack on a military barracks near the southern city of Mykolaiv is reported to have killed scores of Ukrainian soldiers. A source told the BBC that around 200 soldiers were sleeping there when three missiles hit the base.