R. Kelly Appears in Federal Court, Lawyer Blasts Decades-Old Charges

R&B singer R. Kelly leaves the Leighton Criminal Courts Building following a hearing

R. Kelly has been arrested on federal sex trafficking charges.

The questions concerned one of Kelly's girlfriends, Azriel Clary, who allegedly traveled over state lines to be with the singer while she was a minor.

Kelly was being held at the high-rise Metropolitan Correctional Center in downtown Chicago, where he will remain at least until a hearing scheduled for Tuesday.

Kelly has pleaded not guilty to the IL charges.

Kelly's attorney, Steve Greenberg, confirmed to the Sun-Times that the singer had been arrested and his publicist told WBBM that a press conference would be held on Friday morning.

He was arrested after the indictment was handed down earlier Thursday in federal court for the Northern District of IL. "Kelly will appear in federal court in Brooklyn at a later date". It was released the same day federal prosecutors in NY charged Kelly with racketeering other sex-related crimes. Authorities say he confined the victims against their will, forcing them to engage in sex acts and sometimes filming the sexual activity. The 52-year-old Grammy victor, whose real name is Robert Kelly, was arrested in February on 10 counts in IL involving four women, three of whom were minors when the alleged abuse occurred.

It was also his interview with Gayle King in March, which had the world talking. Kelly and McDavid were charged with obstructing the investigation, while Kelly, McDavid and Brown were charged with conspiring to receive child pornography mailed across state lines.

Kelly has been at the center of a number of sexual abuse allegations for almost two decades, with some accusations dating back to the late 90s. ET has reached out to Kelly's rep, Kelly's attorney, the NYPD, Chicago Police and Homeland Security for comment. Kelly plead not guilty to these last month. He also faces obstruction of justice charges.

That complaint alleges that Kelly made four videos of himself raping an underage girl and later provided her family with money and gifts in order to buy their silence ahead of his 2008 trial in Cook County.