A view shows debris of a residential block of a tram depot hit by a Russian missile strike, amid Russia's attack on Ukraine, in Kharkiv, Ukraine August 18, 2022. REUTERS/Vitalii Hnidyi

Rescuers work at the site of a residential building destroyed by a Russian missile strike, amid Russia's attack on Ukraine, in Kharkiv, Ukraine August 17, 2022. REUTERS/Vitalii Hnidyi

Rescuers work at the site of a residential building destroyed by a Russian missile strike, amid Russia's attack on Ukraine, in Kharkiv, Ukraine August 17, 2022. REUTERS/Vitalii Hnidyi

Firefighters work at the site of a residential building damaged by a Russian military strike, amid Russia's attack on Ukraine, in Kharkiv, Ukraine August 17, 2022. Press service of the State Emergency Service of Ukraine/Handout via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

Rescuers carry a person released from debris of a residential building destroyed by a Russian missile strike, amid Russia's attack on Ukraine, in Kharkiv, Ukraine August 17, 2022. REUTERS/Vitalii Hnidyi

Rescuers work at the site of a residential building destroyed by a Russian missile strike, amid Russia's attack on Ukraine, in Kharkiv, Ukraine August 17, 2022. REUTERS/Vitalii Hnidyi

SENSITIVE MATERIAL. THIS IMAGE MAY OFFEND OR DISTURB Rescuers carry a person released from a debris a residential building destroyed by a Russian missile strike, amid Russia's attack on Ukraine, in Kharkiv, Ukraine August 17, 2022. REUTERS/Vitalii Hnidyi

A view shows debris of a residential block of a tram depot hit by a Russian missile strike, amid Russia's attack on Ukraine, in Kharkiv, Ukraine August 18, 2022. REUTERS/Vitalii Hnidyi

Firefighters work at the site of a residential building destroyed by a Russian missile strike, amid Russia's attack on Ukraine, in Kharkiv, Ukraine August 18, 2022. REUTERS/Sofiia Gatilova

Firefighters work at the site of a residential building damaged by a Russian military strike, amid Russia's attack on Ukraine, in Kharkiv, Ukraine August 17, 2022. Press service of the State Emergency Service of Ukraine/Handout via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

Local residents look at debris of a residential block of a tram depot hit by a Russian missile strike, amid Russia's attack on Ukraine, in Kharkiv, Ukraine August 18, 2022. REUTERS/Vitalii Hnidyi

Bodies of people killed during a Russian missile strike are seen inside an ambulance vehicle, amid Russia's attack on Ukraine, in Kharkiv, Ukraine August 17, 2022. REUTERS/Sofiia Gatilova

Rescuers work at the site of a residential building destroyed by a Russian missile strike, amid Russia's attack on Ukraine, in Kharkiv, Ukraine August 17, 2022. REUTERS/Sofiia Gatilova

Rescuers work at the site of a residential building destroyed by a Russian missile strike, amid Russia's attack on Ukraine, in Kharkiv, Ukraine August 17, 2022. REUTERS/Sofiia Gatilova

Rescuers work at the site of a residential building destroyed by a Russian missile strike, amid Russia's attack on Ukraine, in Kharkiv, Ukraine August 17, 2022. REUTERS/Vitalii Hnidyi

A view shows a burning residential building hit by a Russian military strike, amid Russia's attack on Ukraine, in Kharkiv, Ukraine August 17, 2022. Press service of the State Emergency Service of Ukraine/Handout via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

A view shows debris of a residential block of a tram depot hit by a Russian missile strike, amid Russia's attack on Ukraine, in Kharkiv, Ukraine August 18, 2022. REUTERS/Vitalii Hnidyi

Rescuers work at the site of a residential building destroyed by a Russian missile strike, amid Russia's attack on Ukraine, in Kharkiv, Ukraine August 17, 2022. REUTERS/Vitalii Hnidyi