Mayor Eric Adams said he was accused of several federal crimes and vowed to fight what he said were unfounded allegations.

Federal agents searched Gracie Mansion, the mayor's residence, early Thursday, law enforcement officials said. Adams' attorney Alex Spiro said “a dozen” federal agents came to seize the mayor's phone. The park surrounding the mayor's home was cordoned off starting at about 7:15 a.m., although police opened barricades to allow a handful of black SUVs with tinted windows to enter the grounds.

The indictment against the mayor could be released as early as Thursday morning, but the charges against him are still unclear. The development follows months of speculation about a corruption investigation hanging over the mayor since FBI agents seized his digital devices and searched the homes of his staff last year. News of the indictment was first reported by The New York Times.

In a video sent by Spiro, the mayor said he could soon be charged with federal crimes, calling such allegations “completely false and based on lies.”

City hall officials did not respond to numerous requests for comment on Wednesday evening or Thursday morning.

In the two-and-a-half-minute video, Adams referred to himself as a “target.”

“Enough is enough,” he said, “I will fight these injustices with all my strength.”

In the video, the mayor criticized the federal government for failing to address a “broken immigration system” that is overwhelming the city's homeless shelter system. He also rejected calls for his resignation.

A spokesman for the U.S. Attorney's Office for the Southern District of New York declined to comment. Federal police also declined to comment.

Adams is the first mayor in modern New York City history to be charged with a federal crime while in office. The charges represent a stunning downfall for Adams, a retired NYPD captain who once portrayed himself as a national role model for Democrats, making law and order a central part of his tenure.

Brendan McGuire, another attorney for Adams, did not respond to a request for comment.

Adams can remain in office as mayor, but Gov. Kathy Hochul could remove him from office. If he stays in office, he will have to defend himself against federal charges while battling historically low approval ratings and an already large field of Democrats seeking to remove him after just one term.

Three of his primary opponents — State Auditor Brad Lander, State Senator Zellnor Myrie and former Auditor Scott Stringer — have all called on him to resign. State Senator Jessica Ramos, the fourth challenger, did not call for his resignation in a statement Wednesday evening.

Numerous other elected officials from across the political spectrum also called on the mayor to resign.

State Senator John Liu, a Queens Democrat who ran a progressive campaign for mayor in 2013, said New Yorkers “need a mayor who is capable of devoting all of his time and energy to getting the city on the right track.”

“Mayor Adams is simply not in a position to do this in the foreseeable future,” he added.

Council member Bob Holden, a conservative Democrat from Queens, also called on Adams to resign.

“Although he is presumed innocent until proven guilty, he cannot lead effectively with this shadow hanging over him,” Holden said. “Given the challenges facing our city, he must resign for the good of New Yorkers.”

The indictment concludes an investigation that became public in early November last year with a series of FBI raids and sent shockwaves through the city's political community.

Federal authorities have also issued a flurry of search warrants and subpoenas in recent weeks. Agents seized the phones of NYPD Commissioner Edward Caban, Schools Chancellor David Banks, his partner, First Deputy Mayor Sheena Wright, and Deputy Mayor for Public Safety Phil Banks.

Those raids were followed by a wave of high-level departures, including Caban and the city's chief attorney, Lisa Zornberg. The schools chancellor announced Tuesday that he would resign at the end of the year.

Bahar Ostadan and David Brand contributed reporting.

This is a developing story and will be updated throughout the day.