A neighbor walks on the debris of a burning house, destroyed after a Russian attack in Kharkiv, Ukraine, Thursday, March 24, 2022. Photo: AP/UNB

Ukrainians crowd under a destroyed bridge as they try to flee crossing the Irpin river on the outskirts of Kyiv, Ukraine, Tuesday, March 8, 2022. Photo: AP/UNB

A building heavily damaged by multiple Russian bombardments stands near a frontline in Kharkiv, Ukraine, Monday, April 25, 2022. Photo: AP/UNB

Ukrainian soldiers take cover from incoming artillery fire in Irpin, outskirts of Kyiv, Ukraine, Sunday, March 13, 2022. Photo: AP/UNB

Firefighters work to extinguish a blaze at a house after a Russian attack in Kharkiv, Ukraine, Monday, April 11, 2022. Photo: AP/UNB

A man suspected to be a Russian collaborator is detained during an operation by Security Service of Ukraine (SBU) in Kharkiv, Ukraine, Monday, April 18, 2022. Photo: AP/UNB

Internally displaced people from Mariupol and nearby towns arrive in Zaporizhzhia, Ukraine, Friday, April 1, 2022. Photo: AP/UNB

A woman injured in a Russian attack is treated by emergency workers in Kharkiv, Ukraine, Saturday, April 16, 2022. Photo: AP/UNB