A criminal investigation into a Russian prostitution ring involving underage girls uncovered allegations that billionaire tycoon Oleg Deripaska was a client, according to a new investigative report by the exiled news outlets Vyorstka and IStories.

The alleged sex ring operated from at least 2018 to 2019 and masqueraded as regional teen beauty pageants, modeling agencies, as well as dating websites, journalists said, citing law enforcement records provided to them by an anonymous source.

Russian police investigators identified at least four underage victims and pressed criminal charges against five individuals in 2019. One of the victims testified that Deripaska had been a client of the ring, according to the report, which was published on Thursday.

Three defendants were sentenced to up to six years in prison between 2022 and 2024. Of the remaining two, one is still wanted by the Russian authorities while the other has avoided extradition from Austria.

The only male defendant in the criminal case reportedly joined the Wagner mercenary group to fight in the war against Ukraine and was later awarded a medal for bravery.

Russia’s Investigative Committee, which probes major crimes, did not respond to Vyorstka’s and IStories’ requests for comment.