FILE - In this June 6, 2019, file photo, singer R. Kelly pleaded not guilty to 11 additional sex-related felonies during a court hearing before Judge Lawrence Flood at Leighton Criminal Court Building in Chicago. R&B singer R. Kelly is due in federal court to enter a plea to an updated federal indictment that includes sex abuse allegations involving a new accuser. The 53-year-old is expected to plead not guilty at a hearing Thursday, March 5, 2020, in Chicago to a superseding indictment unsealed last month that includes multiple counts of child pornography. (E. Jason Wambsgans/Chicago Tribune via AP, Pool, File)

FILE - In this June 6, 2019, file photo, singer R. Kelly pleaded not guilty to 11 additional sex-related felonies during a court hearing before Judge Lawrence Flood at Leighton Criminal Court Building in Chicago. R&B singer R. Kelly is due in federal court to enter a plea to an updated federal indictment that includes sex abuse allegations involving a new accuser. The 53-year-old is expected to plead not guilty at a hearing Thursday, March 5, 2020, in Chicago to a superseding indictment unsealed last month that includes multiple counts of child pornography. (E. Jason Wambsgans/Chicago Tribune via AP, Pool, File)

CHICAGO (AP) — R&B singer R. Kelly on Thursday pleaded not guilty to an updated federal indictment that includes child pornography charges and allegations involving a new accuser, while prosecutors said more charges alleging yet another victim are upcoming.

Kelly, 53, stood silently in orange prison garb with his hands behind his back as his attorney entered the plea on his behalf at the arraignment hearing in Chicago.

More legal trouble is on the horizon for Kelly.

The government plans to file more new charges in the coming weeks, adding another accuser, prosecutor Angel Krull said during the hearing. She didn’t elaborate except to say agents recently seized more than 100 electronic devices, including hard drives, in the case.

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Agents wielding a search warrant hauled the items away from a storage facility outside Chicago where Kelly keeps some of his equipment, defense attorney Steve Greenberg told reporters after the hearing.

“We expect that they’re not going to find anything incriminating,” he said.

The possibility of new charges in yet another superseding indictment was among the reasons cited by U.S. District Judge Harry Leinenweber to push Kelly’s April 27 trial date to Oct. 13.

The 13-count superseding indictment was unsealed last month. It is largely the same as the original indictment — which also had 13 counts — but includes a reference to a new accuser, referred to only as “Minor 6.”

The charges include child pornography, the sexual exploitation of children and conspiracy to defraud the U.S. government, as well as the coercion or enticement of a female.

Kelly, who has denied ever abusing anyone, faces several dozen counts of state and federal sexual misconduct charges in Illinois, Minnesota and New York , from sexual assault to heading a racketeering scheme aimed at supplying Kelly with girls.

The Grammy-award winning musician was jailed in July and has been awaiting trial at a Chicago federal jail a block from the courthouse where he attends pretrial hearings. He has participated in hearings in his New York case by video.

The federal charges in Chicago accuse Kelly of filming himself having sex with underage girls and of paying off potential witnesses in his 2008 trial — at which he was acquitted — to get them to change their stories.

Kelly’s co-defendants in the case — ex-manager Derrel McDavid and former employee Milton Brown — have also pleaded not guilty to paying hundreds of thousands of dollars to retrieve pornographic videos in a bid to stave off criminal charges.

McDavid’s lawyer, Beau Brindley, told the court Thursday that his client wanted to proceed with an April trial without Kelly. He said McDavid’s “life is on hold” and was invoking his right to a speedy trial. But Brindley said later that the defense would take a week to decide their next steps.

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Follow Michael Tarm on Twitter at https://twitter.com/mtarm

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Check out the AP’s complete coverage of the R. Kelly case.