War in Ukraine. Map of Ukraine. The horrors of war by region.

Sumy, about 350km (220 miles) east of Kyiv, has experienced weeks of heavy fighting.

Refugees gather in a street as they leave the besieged port city of Mariupol

Sandbag barricades are seen in Zaporizhzhia on March 17.

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.

Firefighters work to extinguish flames at an apartment building in Kyiv on March 15. .

Masha Feshchenko, 15, rests in Zaporizhzhia's children's hospital after being severely wounded

A local resident rides a bicycle past a building destroyed during Ukraine-Russia conflict in the separatist-controlled town of Volnovakha in the Donetsk region, Ukraine.

Ukrainian servicemen carry rocket-propelled grenades and sniper rifles as they walk towards the city of Irpin, northwest of Kyiv, on March 13, 2022.

Kharkiv, Ukraine: 13 March, 2022 - Destroyed residential building, as a result of explosions and shots by the Russian occupying military in Kharkiv

Lviv, Ukraine: 12 March, 2022 - Coordination center for refugees in Lviv