A white-haired Long Island town board member attacked a fellow politician on the dais during a closed-door government meeting – allegedly unloading a flurry of punches, cops and sources said.

Smithtown Town Board member Thomas Lohmann, 68, was charged with assaulting fellow Republican Tom McCarthy, 68, during a Tuesday executive session where the pols got heated over an undisclosed legal matter, sources told The Post.

Lohmann got up and rushed McCarthy – who was sitting four seats away – and punched him multiple times as the town supervisor, town attorney and other board members watching the suit-wearing pair scuffle, the sources said.

Two men in suits, one with his hand raised as if to punch the other, facing each other across a table.

Smithtown councilman and Deputy Supervisor Tom McCarthy got into a heated argument at a board meeting. Obtained by NY Post

Councilman Thomas Lohmann physically assaulting Councilman Tom McCarthy.

The two men were seen arguing before it got physical. Obtained by NY Post

A furious McCarthy can be seen tossing a chair as he confronts Lohmann after the alleged attack, according to video obtained by The Post.

Lohmann, a former NYPD homicide detective and assistant special investigator for the Suffolk County district attorney before taking office in 2018, is now charged with assault and due in court April 28.

McCarthy, who previously defeated Lohmann in a 2017 Republican primary for town council, has since told Newsday that he no longer feels safe working with Lohmann and is now seeking a restraining order against his colleague.

Councilman Thomas Lohmann in front of an American flag.

Thomas Lohmann was charged with assault. Town of Smithtown

Headshot of Smithtown Councilman and Deputy Supervisor Tom McCarthy.

Tom McCarthy was assaulted by fellow colleague Thomas Lohmann. Town of Smithtown

He was punched multiple times in the jaw, neck and shoulder and required an MRI on four different parts of his body, the outlet reported.

Lohmann and McCarthy did not immediately respond to a request for comment.