A Manhattan grand jury has indicted New York Mayor Eric Adams on federal criminal charges, multiple sources familiar confirmed to Fox News. The details about the indictment remain under seal.

Multiple sources have confirmed to Fox News that the indictment could be unsealed as early as tomorrow.

The FBI and Department of Justice are declining to comment on the matter, and it is unclear who Adams has retained as his personal attorney.

"I always knew that if I stood my ground for New Yorkers that I would be a target — and a target I became," Adams said in a statement obtained by The Associated Press. "If I am charged, I am innocent, and I will fight this with every ounce of my strength and spirit."

Several people have already been raided in the orbit of the 63-year-old former NYPD captain.

FBI RAIDS HOME OF NYC MAYOR ERIC ADAMS' CHIEF FUNDRAISER BRIANNA SUGGS, SOURCE SAYS

Mayor Eric Adams attends a press conference as a NYPD officer says he was the ringleader of a campaign donation scheme to help the New York City mayor. (AP Photo/Eduardo Munoz Alvarez, File)

In February, FBI agents raided the home of Winnie Greco, one of his top aides, in the Bronx. In November, feds swarmed the property of another aide, Cenk Ocal, a former Turkish airlines executive who joined the mayor's transition team. That same month, they visited Brianna Suggs, the mayor's chief fundraiser.

ADAMS OFFICE LASHES OUT AT FBI EMPLOYEE WHO MIGHT HAVE ‘IMPROPERLY LEAKED DETAILS’ OF CORRUPTION PROBE

Rana Abbasova, another close aide, reportedly flipped on the mayor in May after scrutiny over his dealings with Turkish Airlines, according to the New York Times.

New York City Mayor Eric Adams attends a press conference on gun violence at the Office of Chief Medical Examiner on June 26, 2023, in New York City.  (Michael M. Santiago/Getty Images)

Statements from the New York State Conservative Party Chairman agree that this move is the best course of action for the city moving forward.

"The mayor and his administration appear to be riddled with corruption, and the public has lost all confidence in their ability to move the five boroughs forward. Mr. Adams should do what's best for this city and step aside so that a new election can be held. His situation is untenable," said New York State Conservative Party Chairman Gerard Kassar.

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The FBI has reportedly been looking into whether Adams' 2021 mayoral campaign conspired with the Turkish government and other entities to raise funds.

The Associated Press contributed to this report.