"Over 150 soldiers from the LPR were liberated from the Ukrainian prison. And each of them told us that they had experienced inhuman treatment. Over 150 of them recounted instances of physical violence against them," Viktoria Serdyukova told a briefing.
Over the past three weeks, there has been a number of prisoner swaps between Russia and Ukraine, with the latest one taking place on December 6 as the sides exchanged 60 servicemen.
On November 18, a video emerged on social media showing what appears to be execution through shooting of 10 Russian prisoners by the Ukrainian military. On December 2, the UN Commission of Inquiry on Ukraine said the UN was investigating the video.