The Feds are reportedly searching for more of R. Kelly's sex tapes in their human trafficking case.

According to TMZ, a source told them that the U.S. Attorney's Office for the Northern District of Illinois is interviewing parties closely associated with Kelly in connection with a possible existence of VHS tapes which allegedly showing Kelly having sex with minors.

There have been rumors of a stash of Kelly tapes with his rapes of underage girls floating around since his trial back in 2008 - but the stash has never been found.

The breaking news outlet also reports that the feds in Illinois are investigating Kelly on three different fronts: sex trafficking, tax evasion and obstruction of justice.

Kelly and his handlers may have pressured witnesses in the run up to his 2008 trial and may have even allegedly paid off witnesses to stop them from testifying in court or speaking out publicly.

One of Kelly's attorneys, Steven Greenberg, told them: "The purpose of this, as with all investigations, is to see if there was or was not wrongdoing. It certainly does not mean there was."