A woman reads in a metro station in northern Kharkiv where she lives to shelter from shelling in her neighbourhood as Russia's attack on Ukraine continues, Ukraine, March 24, 2022. REUTERS/Thomas Peter 

People who are sheltering in a metro station in northern Kharkiv receive food from volunteers as Russia's attack on Ukraine continues, Ukraine, March 24, 2022. REUTERS/Thomas Peter 

A woman helps an elderly person to walk down the stairs as they shelter in a metro station in northern Kharkiv from shelling in their neighbourhood as Russia's attack on Ukraine continues, Ukraine, March 24, 2022. REUTERS/Thomas Peter 

Raisa sits in a stationary subway car in a metro station in northern Kharkiv where she lives to shelter from shelling in her neighbourhood as Russia's attack on Ukraine continues, Ukraine, March 24, 2022. Raisa has moved underground 30 days ago on the first day of the war. REUTERS/Thomas Peter 

A man sits in a metro station in northern Kharkiv where he lives to shelter from shelling in his neighbourhood as Russia's attack on Ukraine continues, Ukraine, March 24, 2022. REUTERS/Thomas Peter 

People shelter in a metro station in northern Kharkiv to escape shelling in their neighbourhood as Russia's attack on Ukraine continues, Ukraine, March 24, 2022. REUTERS/Thomas Peter 

Katarina Bovt holds son son Nikita in a metro station in northern Kharkiv where they live to shelter from shelling in their neighbourhood as Russia's attack on Ukraine continues, Ukraine, March 24, 2022. Bovt has moved to the underground shelter three weeks ago. REUTERS/Thomas Peter 

Natalia Shaposhnik, 36, plays with her daughter Veronika, 7, in a stationary subway car in a metro station in northern Kharkiv where they live to shelter from shelling in their neighbourhood as Russia's attack on Ukraine continues, Ukraine, March 24, 2022. Shaposhnik and her daughter moved underground with 30 days ago, on the first day of the war. REUTERS/Thomas Peter 

Lyudmila Lazareva and her dog Rika sit in a in a metro station in northern Kharkiv with Katarina Bovt, Kolya and their son Nikita where they live to shelter from shelling in their neighbourhood, as Russia's attack on Ukraine continues, Ukraine, March 24, 2022. Lazareva has moved to the underground shelter 30 days ago after the apartment building next to hers got hit by a shell on the first day of the wa and she only leaves the station to briefly walk her dog. REUTERS/Thomas Peter 

People who are sheltering in a metro station in northern Kharkiv stand in line to receive food from volunteers as Russia's attack on Ukraine continues, Ukraine, March 24, 2022. REUTERS/Thomas Peter 

People shelter in a metro station in northern Kharkiv from shelling in their neighbourhood as Russia's attack on Ukraine continues, Ukraine, March 24, 2022. REUTERS/Thomas Peter TPX IMAGES OF THE DAY 

Veronika Shaposhnik, 7, sits in a stationary subway car in a metro station in northern Kharkiv where she lives with her mother to shelter from shelling in her neighbourhood as Russia's attack on Ukraine continues, Ukraine, March 24, 2022. Veronika moved underground with her mother 30 days ago, on the first day of the war. REUTERS/Thomas Peter 

People who are sheltering in a metro station in northern Kharkiv stand in line to receive food from volunteers as Russia's attack on Ukraine continues, Ukraine, March 24, 2022. REUTERS/Thomas Peter 

People who are sheltering in a metro station in northern Kharkiv stand in line to receive food from volunteers as Russia's attack on Ukraine continues, Ukraine, March 24, 2022. REUTERS/Thomas Peter 

People sit in a stationary subway car in a metro station in northern Kharkiv where they live to shelter from shelling in their neighbourhood, as Russia's attack on Ukraine continues, Ukraine, March 24, 2022. REUTERS/Thomas Peter 

People shelter from shelling in a metro station, as Russia's attack on Ukraine continues, in Kharkiv, Ukraine March 10, 2022. REUTERS/Vitalii Hnidyi 

People shelter from shelling in a metro station, as Russia's attack on Ukraine continues, in Kharkiv, Ukraine March 10, 2022. REUTERS/Vitalii Hnidyi 

People shelter from shelling in a metro station, as Russia's attack on Ukraine continues, in Kharkiv, Ukraine March 10, 2022. REUTERS/Vitalii Hnidyi