The prisoner's stepbrother, Alexander Serikov, told Sputnik on Tuesday that Ukrainian armed forces were demanding a ransom of 1 million rubles ($10,200) from the family of a captured Russian soldier, threatening to kill him.
"He is now in a field barracks where a very large number of angry Ukrainians want to do all kinds of medical and human experiments on him, and then most of those in the same position will throw him out somewhere on the edge of the forest," a woman representing the Ukrainian side said on the recording, demanding money.
The mother of Russian serviceman Igor Shchegolevaty said she was calling on international organizations to help bring her son home.
"We ask international organizations to help us find our son, who is in Ukrainian captivity, so that he will not be mocked, killed, treated humanely and returned home as soon as possible," she said.