FBI raids New York City's Sergeants Benevolent Association union office

The FBI on Tuesday raided the offices of a New York City police union in Manhattan.

In addition to executing a search warrant at the headquarters of the Sergeants Benevolent Association, an FBI spokesperson said, the bureau was also searching a home in the Long Island suburb of Port Washington.

That home belongs to the SBA's outspoken leader, Ed Mullins, sources told NBC News.

It was not immediately clear why the FBI targeted the SBA, which represents 13,000 members of the New York City Police Department and is the fifth-biggest police union in the country.

New York City Mayor Bill de Blasio said he was aware of the FBI raid but provided no details.

Mullins, who has run the union since 2002, could not immediately be reached for comment. But he has frequently clashed with both the NYPD leadership and de Blasio.

The union leader's acerbic Twitter posts have included calling a city councilman a “first class whore,” calling a former health commissioner a “b----,” and in response to the officer-involved shooting death of Michael Brown and subsequent protests, he said, “Ferguson Missouri was a lie and a nation of police have been under attack ever since.”

Mullins also remains a strong supporter of former President Donald Trump.

The SBA's bylaws require Mullins to continue working as an NYPD sergeant, but records show he is not currently assigned a specific post. And while he was paid $133,195 by the city in 2020, his full-time job was running the SBA which pays him an additional salary.

Mullins was paid $88,757 by the union in 2019, according to the SBA's most recent 990 filing which listed him as a trustee.

This is a developing story, check back for updates.

FBI raids New York City's Sergeants Benevolent Association union officeJonathan Dienst

Jonathan Dienst is a reporter for WNBC-TV in New York, leading its investigative reporting team and covering justice and law enforcement issues.

FBI raids New York City's Sergeants Benevolent Association union officeTom Winter

Tom Winter is a New York-based correspondent covering crime, courts, terrorism and financial fraud on the East Coast for the NBC News Investigative Unit.

Corky Siemaszko is a senior writer for NBC News Digital.