Mayor Eric Adams said he is facing charges for a range of federal crimes and vowed to fight what he called unfounded accusations.

Federal officers searched Gracie Mansion, the mayor’s residence, early Thursday morning, law enforcement officials said. Adams’ attorney Alex Spiro said “a dozen” federal agents arrived to seize the mayor’s cell phone. The park surrounding the mayor’s home was closed as of about 7:15 a.m., though officers opened barricades to allow a handful of black SUVs with tinted windows to drive onto the property.

The mayor’s indictment could be made public as early as Thursday morning, but the charges against him remain unclear. The development follows months of speculation about a corruption investigation that has hung over the mayor since FBI agents seized his digital devices and searched the homes of his aides last year. News of the indictment was first reported by The New York Times.

In a video Spiro sent, the mayor says he may soon be charged with federal crimes, calling such charges “completely bogus based on lies.”

City Hall officials did not respond to numerous requests for comment Wednesday evening and Thursday morning.

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

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

The mayor criticized the federal government in the video for what he said was inaction on “a broken immigration system” that was overwhelming the city’s reception system. He also dismissed calls for him to resign.

A spokesman for the U.S. Attorney’s Office for the Southern District of New York declined to comment. Federal law enforcement officials also declined to comment.

Adams is now 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 cast himself as a national model for Democrats. He made law and order central to his mayoralty.

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

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

Three of his primary challengers — Comptroller Brad Lander, Senator Zellnor Myrie and former Comptroller Scott Stringer — have all called on him to resign. Senator Jessica Ramos, the fourth challenger, stopped short of demanding he step aside in a statement Wednesday night.

A number of other elected representatives from across the political spectrum have also called on the mayor to resign.

Sen. John Liu, a Queens Democrat who ran a progressive campaign for mayor in 2013, said New Yorkers “need a mayor who can commit himself full-time and with full energy to getting the city on track.”

“Mayor Adams is simply not able to do that in the foreseeable future,” he added.

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

“While he is presumed innocent until proven guilty, he cannot lead effectively with this cloud hanging over his head,” Holden said. “Given the challenges facing our city, he must step down for the good of New Yorkers.”

The indictment is the culmination of an investigation first made public in early November last year in a series of FBI raids that sent shock waves 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 searches were followed by a wave of high-profile departures, including Caban and the city’s chief legal officer, Lisa Zornberg. The schools chancellor announced Tuesday that he would step down 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.