A look inside Russia's siege on Mariupol

Local residents stay at a bomb shelter during Ukraine-Russia conflict in the besieged southern port city of Mariupol, Ukraine, March 20, 2022.

A woman walks on a deserted street in Kyiv, Ukraine, March 21, 2022.

A woman measures a window before covering it with plastic sheets in a building damaged by a bombing the previous day in Kyiv, Ukraine, March 21, 2022.

Slava Chikov (L) covers the shattered window of his living room with a plastic sheet in a building damaged by a bombing the previous day in Kyiv, Ukraine, March 21, 2022.

A view shows a line of cars near blocks of flats destroyed during the Ukraine-Russia conflict, as evacuees leave the besieged port city of Mariupol, Ukraine, March 17, 2022.

Service members of pro-Russian troops are seen in the body of a truck during the Ukraine-Russia conflict on a road near the besieged southern port city of Mariupol, Ukraine, March 21, 2022.

Evacuees fleeing the Ukraine-Russia conflict sit in a car as they wait to leave the besieged southern port city of Mariupol, Ukraine, March 17, 2022.

Evacuees fleeing the Ukraine-Russia conflict sit in a damaged car as they wait to leave the besieged southern port city of Mariupol, Ukraine, March 17, 2022.

A service member of pro-Russian troops walks near a line of cars with evacuees leaving the besieged southern port city of Mariupol, Ukraine, March 17, 2022.

Dead bodies are placed into a mass grave on the outskirts of Mariupol, Ukraine, March 9, 2022, as people cannot bury their dead because of heavy shelling by Russian forces.

Evacuees fleeing the Ukraine-Russia conflict walk out of the besieged southern port city of Mariupol, Ukraine, March 17, 2022.

A local resident seeks refuge in the basement of a building during the Ukraine-Russia conflict in the besieged southern port city of Mariupol, Ukraine, March 17, 2022.

Local residents seek refuge in the basement of a building during the Ukraine-Russia conflict in the besieged southern port city of Mariupol, Ukraine, March 17, 2022.

Men pool carts while walking past a line of cars with evacuees leaving the besieged southern port city of Mariupol, Ukraine, March 17, 2022.

People walk near a building destroyed in the besieged southern port city of Mariupol, Ukraine, March 17, 2022.

Service members of pro-Russian troops check cars as local residents leave the besieged southern port city of Mariupol, Ukraine, March 17, 2022.

A woman reacts while speaking near a block of flats destroyed in the besieged southern port city of Mariupol, Ukraine, March 17, 2022.

People walk near blocks of flats destroyed in the besieged southern port city of Mariupol, Ukraine, March 17, 2022.

Service members of pro-Russian troops in uniforms without insignia drive an armored vehicle in the besieged southern port city of Mariupol, Ukraine, March 19, 2022.

Residents attempt repairs on the shattered windows of an apartment block damaged by bombing the previous day in Kyiv, Ukraine, March 21, 2022.

People walk near a block of flats destroyed in the besieged southern port city of Mariupol, Ukraine, March 17, 2022.

The Associated Press (AP) photographer Evgeniy Maloletka stands amid rubble of an airstrike on Pryazovskyi State Technical University, March 10, 2022, in Mariupol, Ukraine.

Local residents take cover as they hear blasts in the besieged southern port city of Mariupol, Ukraine, March 20, 2022.

Slava Chikov covers the shattered window of his living room with a plastic sheet in a building damaged by bombing that occurred the previous day in Kyiv, Ukraine, March 21, 2022.

Local residents carry bottles with water in the besieged southern port city of Mariupol, Ukraine, March 20, 2022.

Service members of pro-Russian troops are seen atop tanks on the outskirts of the besieged southern port city of Mariupol, Ukraine, March 20, 2022.

Local residents walk near residential buildings damaged in the besieged southern port city of Mariupol, Ukraine, March 18, 2022.

Service members of pro-Russian troops are seen atop tanks during the Ukraine-Russia conflict on the outskirts of the besieged southern port city of Mariupol, Ukraine, March 20, 2022.

Refugees gather in a street as they leave the city during the Ukraine-Russia conflict in the besieged southern port of Mariupol, Ukraine, March 20, 2022.

This satellite image provided by Maxar Technologies, March 19, 2022, shows the aftermath of the airstrike on the Mariupol Drama theater (C) and the area around it in Mariupol, Ukraine.

Seen through partially drawn curtains a house burns after shelling in Mariupol, Ukraine, March 12, 2022.

Service members of pro-Russian troops check cars during the Ukraine-Russia conflict in the besieged southern port city of Mariupol, Ukraine, March 20, 2022.

A Ukrainian service member and a civilian carry a wounded man who was injured by shelling in a hospital in Mariupol, Ukraine, March 3, 2022.

AP videographer Mstyslav Chernov walks amid smoke rising from an air defense base in the aftermath of a Russian strike in Mariupol, Ukraine, Feb. 24, 2022.

A Ukrainian service member guards his position in Mariupol, Ukraine, March 12, 2022.

A woman cleans up a room in a building damaged by bombing that occurred the previous day in Kyiv, Ukraine, March 21, 2022.