The investigation Diddy is far from over… Sources have told TMZ that at least one person has been subpoenaed to testify before the grand jury — and we’re told others want to cooperate with federal prosecutors.

Sources with direct knowledge told TMZ … two new people are seeking to cooperate with the government’s ongoing investigation into Diddy and are prepared to testify before the grand jury in the coming days.

We’re told one of those people is currently a sex worker and claims she dated Diddy in 2014.

Beyond the grand jury investigation, we’re told federal authorities are still gathering information and interviewing witnesses… and according to our sources, they have, as far as we know, made contact with at least one sex worker.

We’ve reached out to this sex worker, who says she plans to face government questioning in New York later this month.

The federal case against Diddy has picked up speed in recent days… with federal authorities Arrest of the rap mogul in New York on Monday evening. They charged him with conspiracy to commit organized crime, sex trafficking by force, fraud or coercion, and transportation for the purpose of prostitution.

Diddy was Bail denied twice — just yesterday, a judge upheld the previous decision to hold him without bail pending his trial — and he is currently in New York City jail. notorious internment campMDC Brooklyn.

Diddy’s lawyer, Marc Agnifilosays he’s working to get his client out of MDC Brooklyn and into better housing … while Diddy remains focused on his defense.