The prisoners being held in a Russian-controlled detention facility in Olenivka, in the eastern Donetsk region, were killed by an apparent explosion July 28-29 2022.
Unverified Russia media video footage showed the burned out remains of the prison and charred bodies.
Russia's defence ministry said at the time that a missile strike by a U.S.-made HIMARS rocket was responsible.
Kyiv, which frequently raises the incident, has maintained that Russia conducted the explosion at the Olenivka prison in order to hide mistreatment of the Ukrainian captives held inside.
The U.N. rights office has previously said both Russia and Ukraine have abused prisoners of war during the conflict, although the former has done so on a bigger scale.
Persons:
Human Rights Volker Turk, Emma Farge, Max Hunder, Jonathan Oatis
Organizations:
Human Rights, UN, Thomson
Locations:
GENEVA, Donetsk, Russian, Olenivka, Russia, U.S, Kyiv, Moscow, Ukraine