Sean 'Diddy' Combs pleads not guilty to additional charges in federal sex trafficking case

NEW YORK -- Music mogul Sean Combs pleaded not guilty to additional charges filed against him in a superseding indictment returned earlier this month.

The new indictment against Combs adds an additional charge of sex trafficking and an additional charge of transportation to engage in prostitution, exposing Combs to the possibility of additional prison time if convicted.

During a hearing Monday afternoon Combs told U.S District Court Judge Arun Subramanian he had seen the new indictment and discussed it with his attorney. He waived a public reading of the document.

Combs' defense team signaled they may be asking for an official delay to the start of the trial.

Attorneys for Combs raise what they called issues with getting evidence from the government accusing prosecutors of intentionally not taking possession of hundreds of thousands of emails and messages from a "Victim 4," who they describe as key witness in the case, so they wouldn't have share them with the defense.

Prosecutors responded saying they haven't taken possession of all of the messages due to the sheer volume of emails and due to resource and efficiency concerns.

Judge Subramanian suggested to defense attorneys that they be more specific in their request for emails and messages to help facilitate getting that martial and also said "we are a freight train moving towards trial," telling defense if they plan to request a two-week adjournment based on their access to discovery they needed to do it within 48 hours.

Prosecutors also acknowledged that the deadline to produce a witness list was delayed until Wednesday but questioned the need to produce that list if the defense is planning to request a two week adjournment.

Combs was arrested last year after being charged in a sprawling sex trafficking indictment.

The U.S. attorney says for years Combs used his business empire to sexually abuse and exploit women -- and used his empire to commit violence and obstruction of justice.

While they didn't speak on Monday, Combs' attorneys have maintained his innocence all along, saying the victims are former girlfriends who partook in consensual relationships.

Combs is expected to be tried on the now-five count indictment next month.

(ABC News contributed to this report.)