Jay-Z, Accused in Suit of Raping Minor with Sean Combs (Diddy).

Jay-Z was accused of raping a 13-year-old girl with Sean Combs (Diddy) in a lawsuit filed Sunday by an unnamed plaintiff. He vehemently denied the allegation and accused the lawyer who brought the suit of trying to blackmail him with false claims.

The allegations against the billionaire rapper and hip-hop mogul came as part of the flurry of litigation against Mr. Combs, who is facing federal sex trafficking and  charges and at least 30 lawsuits accusing him of sexual misconduct.

One of those lawsuits, filed in October, accused Mr. Combs and an anonymous celebrity of raping the teen at an after-party following the MTV Video Music Awards in New York in 2000.

On Sunday, the plaintiff amended the lawsuit to name Jay-Z as the other celebrity, asserting in court papers that he and Mr. Combs took turns raping her after she arrived at the party and drank part of a drink that made her feel “woozy and lightheaded.”

Jay-Z called the claims “idiotic” and said that he came from a world where “we protect children.” Mr. Combs has denied all allegations of sexual assault and misconduct and has pleaded not guilty to the criminal charges.

In an extensive response, Jay-Z, 55, said he had received a demand letter from Mr. Buzbee appearing to seek a settlement but that the letter had the opposite effect.

The statement went on to say: “My heart and support goes out to true victims in the world, who have to watch how their life story is dressed in costume for profitability by this ambulance chaser in a cheap suit. You have made a terrible error in judgment thinking that all ‘celebrities’ are the same. I’m not from your world. I’m a young man who made it out of the project of Brooklyn. We don’t play these types of games.”

According to the Buzbee lawsuit filed in Federal District Court in Manhattan, the plaintiff went to Radio City Music Hall to try to gain entrance to the award show being held there or to attend an after-party. She said in the suit that she approached several limousine drivers parked near the venue, and that a driver for Mr. Combs agreed to take her to an after-party, which she described as having taken place at a “large white residence with a gated U-shaped driveway.”

The lawsuit suit said the Complainant was held down by Jay-Z as he raped her, but that while Mr. Combs was assaulting her, she began hitting him in the neck and managed to escape the party. The suit said she ran to a gas station, where her father picked her up.

Mr. Combs’s lawyers have denied that he sexually assaulted anyone and have said that the news conference Mr. Buzbee held was part of a “reckless media circus” and a publicity stunt.

 The judge overseeing the case against Mr. Combs and Jay-Z granted the plaintiff anonymity on a temporary basis, but she will soon re-evaluate whether the plaintiff can proceed without identifying herself.