A retired police officer was killed in a fatal shooting on Monday night in the Kensington section of Brooklyn, the NYPD said. Identified by the Police Benevolent Association as Thomas Marrinan, the 57-year-old was apparently shot by his friend, a retired correction officer, during a confrontation with a third man, who also wounded by the gun shot.

Deputy Chief Joseph Gulotta, who heads Brooklyn South, said an 86-year-old man was in a dispute with a 33-year-old man at the Korner Pizza, at Church Avenue and East 3rd Street, after 7 p.m., and that Marrinan and the retired correction officer, 53, had gone to the elderly man's aid.

"The two males who in their 50s confronted the 33-year-old and a physical fight ensued," Gulotta described during a press conference at the scene. "During the course of the struggle, which moved down the block, the 53-year-old male pulled out his firearm and one round, we believe, was discharged, striking both victims."

Marrinan was struck in the chest, while the younger man suffered a gun shot wound to the arm. Both were taken to Maimonides Hospital, were Marrinan was pronounced dead and the 33-year-old is in stable condition.

One man, Denzel Smith, recounted what he saw to the Post, "The elderly guy was getting cursed at by the pizza bench. The young guy said, ‘I’m gonna get you man, I’m gonna shoot you!’” He added, "This is a safe neighborhood. And it shocked me this … fighting and a shooting."

Marrinan was well-known in the neighborhood. Another friend, Alan Dubrow, told the Daily News, "Thomas is a retired transit cop and union delegate. He was known as Tommy Donuts, because everywhere he went, he brought donuts. I’m really upset. Tommy is just a swell guy. It’s a real tragedy. He was always looking out for the neighborhood.”

The shooting took place in the 66th Precinct; there were no shootings in the precinct through May 30th this year.

The NYPD had no further details about the 53-year-old or 33-year-old involved in the incident as of Tuesday morning.