Police officers in Russia's Sverdlovsk region are suspected of filming a detainee sodomizing a fellow inmate instead of stopping the violence, investigators said on Wednesday.
The officers also uploaded their "prison porn" video online, the local branch of the Investigative Committee said on its website.
Regional police earlier identified the officers as Vitaly Pelevin and Alexei Reshetov, saying that they were sacked and that 12 of their superiors will face unspecified penalties over the scandal.
The incident took place on June 17, but the police attempted to cover it up, the investigators said. They did not identify the victim or the alleged rapist, saying only that the latter is 34 years old and attacked the inmate when waiting for questioning in pretrial detention.
If charged and convicted, the policemen may face up to three months in prison for negligence.
Russian police often figure in scandals involving detainee abuse. In a recent high-profile case in February, a man with a criminal record was raped to death with a champagne bottle by officers at a police precinct in Tatarstan.