Cops are asking for the public’s help in apprehending a trio of punks who beat up an off-duty New York City firefighter in Queens on Friday.

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Cops on Sunday released pictures of three young men suspected in the caught-on-camera attack. One has a thin build with long dark hair, and was last seen wearing a black t-shirt, shorts and sneakers, cops said.

Another teen also wore a black t-shirt, white sneakers and light shorts and has a medium build with short straight hair, according to police.

The NYPD said the third suspect in the mob has a thin build with short straight hair. The hooligan was captured in a picture wearing a gray t-shirt, Nike shorts and white sneakers, cop said.

A 44-year-old FDNY worker said he was walking his dog in Juniper Valley Park in Middle Village about 9:55 p.m., when he was accosted by a crew of teenagers who were screaming and setting off fireworks in the street. Police said the victim was hit in the head with a glass bottle at 75th Street and Juniper Boulevard North.

The mob surrounded the victim as his pooch barked, video previously obtained by The Post shows.

"Give him a shot! Give him a shot! Give him a shot!" one of the teens repeatedly says, footage shows. One of the band of teens shouted that it was "Fight Night," and another texted "Old guy with a dog got f––ed up," the video shows.

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No arrests of suspects involved in the brutal beatdown have been made.

"There were at least 100 kids … I was walking my dog. They just picked me out and approached me," the victim told The Post Saturday.

"One kid took his shirt off and said, ‘it’s Fight Night!’ He said he was 19 and said, ‘I could fight you.’ Everyone took their cell phones out. There were cell phones everywhere," he previously recalled.

"They all came at me," he added. "A kid came up behind me and hit me in the back of the head with a bottle and I let go of the dog."

"They didn’t care at all. The kids were going crazy."

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