NEW YORK — A federal grand jury in New York will hear new evidence in the criminal case against Sean “Diddy” Combs, according to sources familiar with the matter.

The grand jury is expected to convene Thursday, the sources said.

The sources declined to describe what the new evidence is or who might be called to testify about it.

Federal prosecutors previously raised the possibility of additional charges against Combs.

A spokesman for the US Attorney’s Office for the Southern District of New York declined to comment.

His trial is scheduled for May, but prosecutors have suggested the timing or length of the trial could change if they opt to add charges.

Combs has denied all allegations against him — both criminal and civil. Following the criminal trial, many individuals filed civil lawsuits against the music producer.

In a statement Monday, his defense attorneys responded to new allegations included in a civil lawsuit against the rapper — including one involving the sexual assault of a 10-year-old boy — accusing the plaintiff’s attorney of lack of credibility.

“The attorney behind this lawsuit is more interested in media attention than the truth, as evidenced by his constant media appearances and 1-800 number,” the statement said. “As I’ve said before, Mr. Combs cannot respond to every new publicity stunt, even in response to claims that are ridiculous on their face or demonstrably false.”

Defense attorneys said they and Combs “have full confidence in the facts and the integrity of the judicial process.”

“In court, the truth will prevail: that Mr. Combs has never sexually assaulted or trafficked anyone — male or female, adult or minor,” defense attorneys said.

As for the criminal record, Combs has already pleaded not guilty to conspiracy, sex trafficking and prostitution charges and is being held without bail, over the objection of his lawyers.

As part of his defense, Combs’ lawyers asked the judge to order federal prosecutors to reveal the identities of his accusers, and on Wednesday a judge ruled that a Tennessee woman who claims in a civil lawsuit that Combs sexually assaulted her when era A 19-year-old student from Brooklyn cannot proceed with her case anonymously, considering the woman’s arguments to be “totally without merit.”

“Simply put, allegations of sexual assault, by themselves, are not sufficient to entitle a plaintiff to act under a pseudonym,” Judge Mary Kay Vyskocil wrote in the ruling.

The woman alleged that a security guard took her to a private room at a party hosted by Combs and that the guard told her, “You know what you’re here for.”

Asking to remain anonymous, the woman argued she could be harmed if her name were published, but the judge was ultimately unconvinced.

“Combs has had no contact with the complainant for approximately 20 years since the alleged rape, and Combs is currently being held pending trial. As such, counsel has identified no present threat of physical harm to the plaintiff,” the decision states.

The judge also said Combs has the right to investigate her accuser and her credibility.

This ruling could affect a number of other cases brought by prosecutors who have sued Combs under a pseudonym.