In his sex trafficking case, R Kelly is facing new allegations, including that he had sexual contact with an underage child he met in a McDonald's.

Federal prosecutors in the United States presented the latest claims (but no charges) against the rapper in his ongoing case in a court filing on Friday.

Kelly is accused of conducting a criminal operation with bodyguards, managers, and others who reportedly assisted him in locating women and girls for sex and pornography while the singer exerted control over them, according to authorities.

Six separate women and girls are listed in the formal charges, although they cannot be identified for legal reasons.

Prosecutors now want a jury to hear from more than a dozen other people who the government claims were sexually or physically abused, threatened, or mistreated by Kelly. The jury will be chosen on August 9 in New York.

R Kelly has denied all of the accusations leveled against him.

Kelly allegedly met a 17-year-old boy in a McDonald's restaurant in December 2006 before inviting him to his Chicago studio, according to the fresh allegations.

Kelly allegedly propositioned and had sexual contact with the youngster after asking him what he would do to make it in the industry despite his age, according to the most recent court filing.

The same youngster told Kelly he had access to one of the jury members ahead of the singer's 2008 child pornography trial, and the R&B star asked the then-young man to vouch for him - but the filing does not reveal whether the youth did so.

Kelly was later found not guilty in that case.

According to the lawsuit, the same youngster then referred Kelly to another 16 or 17-year-old guy with whom she began a connection some years later.

Prosecutors also claim he recorded the two adolescents having sexual interactions with others, including some of the rapper's girlfriends.

Lawyers believe that writing up the boys' stories will demonstrate that the charges "weren't isolated events" but rather "weren't part of a larger pattern."