FILE - Soldiers lower the coffin of Andrii Konyaev, a member of the Azov unit, during his funeral in Fastiv, Ukraine, on Tuesday, May 23, 2023. He and more than 50 Ukrainians died in the July 29, 2022, explosions at Olenivka, a Russia-controlled prison camp in eastern Ukraine. (AP Photo/Evgeniy Maloletka, File)
FILE - Journalists visit the destroyed barracks at the Russian-controlled Olenivka prison holding Ukrainian POWs in eastern Ukraine, on Aug. 10, 2022. Russia blamed Ukraine at the time but interviews with survivors witnesses and families of the missing as well as an internal U.N. analysis pointed to Russia as the culprit two years later. (AP Photo/File)
FILE - People hold signs outside the Russian embassy in Kyiv, Ukraine, on July 29, 2023, to mark the anniversary of the explosions at the Russian-controlled prison barracks in Olenivka, eastern Ukraine, which killed dozens of Ukrainian POWs. (AP Photo/Jae C. Hong, File)
FILE - Tetiana Poltorak, left, and Tetiana Artemenko place flags to honor Ukrainian prisoners of war killed in the Olenivka region at a memorial site near the Independence Square in Kyiv, Ukraine, Wednesday, July 5, 2023. (AP Photo/Jae C. Hong, File)
EDS NOTE: GRAPHIC CONTENT - FILE - The burned body of a Ukrainian POW lies in the destroyed barracks of the Russian-controlled prison in Olenivka, eastern Ukraine on Friday, July 29, 2022. More than 50 Ukrainians died and dozens were wounded. (AP Photo/File)