The F.B.I. Raids the Sergeants' Union Headquarters of the New York Police Department.
Additionally, investigators executed a search warrant at the residence of the union's president, according to a source familiar with the situation.
According to two people familiar with the situation, federal authorities searched the Manhattan office of one of the city's largest police unions on Tuesday morning in conjunction with an ongoing investigation.
The Sergeants Benevolent Association represents over 13,000 active and retired New York City police sergeants. Its headquarters were searched as part of an investigation by the Federal Bureau of Investigation and the public corruption branch of the Manhattan United States Attorney's Office, the persons said.
Additionally, investigators executed a search warrant at the Long Island home of the union's president, Edward D. Mullins, according to a source familiar with the operation.
While the investigation's precise focus and scope could not be ascertained immediately, the search of Mr. Mullins's house indicates that the inquiry is at least partially focused on him.
A spokeswoman for the Federal Bureau of Investigation said only that agents were “conducting a law enforcement operation in connection with an ongoing investigation” at the union's Lower Manhattan offices.
At around noon on Tuesday, at least four federal agents were inside the union's offices. To prevent the public from peering inside, the investigators lowered dark wooden blinds and placed pieces of cardboard inside four windows.
Mr. Mullins, who has been the union's president since 2002, could not be reached for comment immediately. The sergeants' union, which claims to be the country's fifth-largest police union, did not immediately reply to inquiries about the raid, which was first reported by The New York Daily News.
Mr. Mullins, who has always been vocal, has gained notoriety in recent years for making impulsive and incendiary remarks on social media, most notably against Mayor Bill de Blasio.
Mr. Mullins recently faced internal disciplinary penalties for his Twitter conduct, which included publishing a police report detailing the detention of Mr. de Blasio's daughter, Chiara, during New York protests.
Internal reports from the Police Department are not routinely released, and the one supplied by Mr. Mullins contained personal information about Ms. de Blasio.
Mr. de Blasio declined to comment on the raid during a Tuesday press conference, stating that he was unaware of the circumstances. However, he stated that Mr. Mullins has long been a "divisive voice" whose behavior was "destructive."
Mr. Mullins is also facing internal disciplinary action after tweets directed against Dr. Oxiris Barbot, the former city health commissioner, and Representative Ritchie Torres, a Bronx-based Democratic lawmaker.
Mr. Torres, who has called for Mr. Mullins' resignation over what he has described as racist, misogynistic, and homophobic remarks, tweeted on Tuesday that Mr. Mullins had been subjected to a "first-class raid" by the Federal Bureau of Investigation.
Mr. Mullins has also come under fire for his vocal right-wing politics in a city where Democrats outnumber Republicans by a large margin. Both the sergeants' union and its bigger sister organization, the Police Benevolent Association, have historically been run by conservatives whose opinions do not reflect those of the city they police.
Mr. Mullins lauded former President Donald J. Trump, a Republican who was widely despised by city people. He also came under fire from liberal politicians following an interview with Fox News in which he was surrounded by paraphernalia associated with QAnon, a fringe conspiracy theory mainly embraced by Trump fans.