A retired NYPD officer shot and wounded his two sons during a family argument at his home in North Bellport late Sunday, then shot and killed himself, Suffolk County police said.

The retired officer, identified as Irvin Noak, 61, was brought by South Country Ambulance to Brookhaven Memorial Hospital Medical Center in East Patchogue, where police said he was pronounced dead.

The sons, Irvin Noak III, 30, and Aaron Noak, 22, who police said also live at the home, also were taken to Brookhaven Memorial. They were admitted in critical condition.

Police said other family members were in the home on Foxglove Circle when the shooting took place at 11:10 p.m., but no one else was injured.

Irvin Noak and family members were in an argument, the details of which were not available, during a party when the two sons intervened, police said.

Retired NYPD Officer Irvin Noak, center, shot his two adult sons, Irvin Noak III, left, and Aaron Noak, right, before turning the gun and killing himself on Sunday, Aug. 14, 2016, according to Suffolk police. Photo Credit: Facebook

The retired officer “then retrieved a handgun from his bedroom and shot his two sons,” police said. Noak then shot and killed himself.

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Noak joined the NYPD in 1982 and retired in 2009, according to the department.

One of his wounded sons has been a victim of gun violence. In 2013, Irvin Noak III, was shot at a basketball court in Wyandanch, police said. Suffolk police would not say Monday if any arrests had been made in that shooting.

Another son, who was not wounded in Sunday’s shooting, is a current NYPD officer, the department said.

A large tent with tables and chairs, some festooned with balloons, were still in the side yard of the home Monday morning in the Atlantic Point complex of townhome-style apartments.

Two people cleaning up the table and chairs declined to comment Monday.

Neighbors said they saw the family setting up for a party Sunday and the festivities, which included music, appeared peaceful.

One neighbor, who has lived across the street from the Noak home for about five years, said he knew Irvin Noak, who had introduced himself as a retired NYPD officer, and said he lived in the complex for more than a decade.

“A very good family and all that,” said the neighbor, who didn’t want to be identified. “A very respected guy. He went out of his way to say hello. I talked to him last week at the mailbox. He said hello to me. . . . He said something as a typical cop would say, he says, ‘I’m looking out for you. I got your back.’ That’s how he was.”

Dilek Falco, 57, has lived in the neighborhood for about a year, and said it’s usually quiet.

“I saw them setting up,” Falco said. “There was music playing. There were people there. It looked like a nice party. It looked like everybody was having a good time.”

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With Anthony M. DeStefano