At least four men were gunned down in a Saturday afternoon shooting outside a public housing complex in Boerum Hill, police said.

Police were called to 574 Warren Street around 4 p.m. and found the victims, ages 21, 23, 25 and 38, with gunshot wounds, cops said.

It’s unclear how many attackers were involved. The victims were taken to local hospitals with non-life-threatening injuries, according to police.

Police radio broadcasts indicated four people had been shot by a suspect who sped off in a red sedan down on 3rd Avenue toward Baltic Street. Police were not immediately able to confirm those details.

A doorman said he heard five to seven gunshots while he was working across the street from the scene of the shooting, which happened just outside NYCHA’s Warren Houses.

“Being across the street from construction, I thought it was just a hammer or something. Then I saw the ambulances and everything running by,” Giovanni Rojas, 30, told The Post.

Residents were left shaken by the afternoon gunplay — but not surprised.

“There’s people standing out here all the time, there’s cops telling them to go home, but they never go home. There’s always problems around here. They got cops 24/7 here,” said Mack Witherspoon, 22, who lives across the street.

“I heard gunshots, I saw two two bodies right there. I saw mad people were running around the block, and then I saw victims down that way,” Witherspoon added.

Another neighbor described a dramatic scene outside her window.

“All I know is I was in my living room and I heard shots and people yelling and screaming and bodies going into ambulances,” she said, adding, “It’s scary when people get hurt. I’m not scared, but I think it’s sad and scary to see people shot on your street.”

A man who was blocked from his apartment by the crime-scene blamed gang violence for the gunplay he said plagues his neighborhood.

“It has to be some gang s–t. That’s the only thing that it could be,” said the man, who declined to provide his name. “That’s the only knuckleheads that would come out here and shoot people nowadays.”