People walk their bikes across the street as smoke rises above a plant of Azovstal Iron and Steel Works during Ukraine-Russia conflict in the southern port city of Mariupol, Ukraine May 2, 2022. REUTERS/Alexander Ermochenko TPX IMAGES OF THE DAY 

Service members of pro-Russian troops fire a BM-21 Grad multiple rocket launch system during fighting in Ukraine-Russia conflict near a plant of Azovstal Iron and Steel Works in the southern port city of Mariupol, Ukraine May 2, 2022. REUTERS/Alexander Ermochenko 

Smoke rises above a plant of Azovstal Iron and Steel Works during Ukraine-Russia conflict in the southern port city of Mariupol, Ukraine May 2, 2022. REUTERS/Alexander Ermochenko 

A cat lies on a chair at the entrance to an apartment building during Ukraine-Russia conflict in the southern port city of Mariupol, Ukraine May 2, 2022. The note on the door reads "People live here". REUTERS/Alexander Ermochenko TPX IMAGES OF THE DAY 

Valentina, a refugee Ukrainian woman from Mariupol, gestures after arriving at a registration centre for internally displaced people, amid Russia's invasion of Ukraine, in Zaporizhzhia, Ukraine May 2, 2022. REUTERS/Ueslei Marcelino TPX IMAGES OF THE DAY 

Smoke rises above a plant of Azovstal Iron and Steel Works during Ukraine-Russia conflict in the southern port city of Mariupol, Ukraine May 2, 2022. REUTERS/Alexander Ermochenko 

A girl looks through a bus window as civilians from Mariupol, including evacuees from Azovstal steel plant, travel in a convoy to Zaporizhzhia, during Ukraine-Russia conflict in the Donetsk Region, Ukraine May 2, 2022. REUTERS/Alexander Ermochenko 

A woman holds a child next to a bus as civilians from Mariupol, including evacuees from Azovstal steel plant, travel in a convoy to Zaporizhzhia, during Ukraine-Russia conflict in the Donetsk Region, Ukraine May 2, 2022. REUTERS/Alexander Ermochenko 

Children are seen with a cat at a temporary accommodation centre for evacuees during Ukraine-Russia conflict in the village of Bezimenne in the Donetsk Region, Ukraine May 1, 2022. REUTERS/Alexander Ermochenko 

Service members of pro-Russian troops stand guard near a temporary accommodation centre for evacuees during Ukraine-Russia conflict in the village of Bezimenne in the Donetsk Region, Ukraine May 1, 2022. REUTERS/Alexander Ermochenko 

Service members of pro-Russian troops stand guard next to a bus for transporting evacuees near a temporary accommodation centre during Ukraine-Russia conflict in the village of Bezimenne in the Donetsk Region, Ukraine May 1, 2022. REUTERS/Alexander Ermochenko 

Local resident Tatiana Bushlanova, 64, sits on a bench near an apartment building heavily damaged during Ukraine-Russia conflict in the southern port city of Mariupol, Ukraine May 2, 2022. REUTERS/Alexander Ermochenko 

A woman is seen inside a bus before departing from a temporary accommodation centre for evacuees during Ukraine-Russia conflict in the village of Bezimenne in the Donetsk Region, Ukraine May 1, 2022. REUTERS/Alexander Ermochenko 

People gather in a courtyard near a residential building, which was heavily damaged during Ukraine-Russia conflict in the southern port city of Mariupol, Ukraine April 29, 2022. REUTERS/Alexander Ermochenko 

Local resident and social worker Oksana Khvostenko, 47, stands near her house, which was heavily damaged during Ukraine-Russia conflict in the southern port city of Mariupol, Ukraine April 29, 2022. REUTERS/Alexander Ermochenko 

A bus convoy carrying civilians from Mariupol, including evacuees from Azovstal steel plant, is seen on a road on the way to Zaporizhzhia, during Ukraine-Russia conflict in the Donetsk Region, Ukraine May 2, 2022. REUTERS/Alexander Ermochenko