Russia and Ukraine have blamed each other for a rocket attack that killed dozens of Ukrainian prisoners of war in the occupied part of Donetsk region.
Ukraine said the prison was targeted by Russia in an effort to destroy evidence of torture and killing.
For its part, Russia said the prison camp in Olenivka was hit by Ukrainian precision rockets.
An adviser to President Volodymyr Zelensky said the scene looked like arson, and that a missile strike would have scattered the bodies.
Daniil Bezsonov, a spokesperson for the Russian-backed separatist Donetsk People’s Republic, said the strike had been a “direct hit on a barracks holding prisoners” and the number killed might increase.