Ukraine has launched an investigation after a video emerged purportedly showing Russian troops killing two Ukrainian soldiers who had surrendered.
Ukrainian prosecutors say the footage shows "a group of people in Russian uniforms" shooting the unarmed Ukrainians at close range.
The prosecutors say the killing of prisoners of war is a "gross violation" of the laws and customs of conflict.
The video has not been independently verified. Russia has not commented.
Since Russia launched its full-scale invasion in February 2022, both Kyiv and Moscow have accused each other of violating the Geneva conventions - a set of international humanitarian laws regulating the conduct of armed conflict, and specifically the treatment of POWs.