Three men were shot in the city in separate incidents early Sunday morning, including one after a car crash in Brooklyn, cops said.

A 21-year-old was shot multiple times in his torso and legs when he got into a fight with two other men after their cars collided in Bushwick around 4:30 a.m., according to police.

The shooter’s vehicle crashed into the victim’s vehicle at Central Avenue and Harman Street, police said. A dispute broke out after the victim exited his vehicle, and he was shot multiple times.

A 25-year-old who was an occupant in the shooter’s vehicle later walked into Kings County Hospital with a gunshot wound to his left arm, cops said. There were no immediate arrests. 

Earlier, a 21-year-old man was shot in his left thigh outside 997 Brook Avenue in the Bronx around 3 a.m., police said. 

He was taken to Brookdale Hospital by private means. He was “highly uncooperative,” police said. The circumstances surrounding the shooting were unknown.

About an hour before that, a man in his 30s was shot once in his chest while sitting in the back of a vehicle at a red light, police said.

The shooter fired from a white Nissan SUV and fled, cops said. The victim was taken to Bronx Lebanon Hospital in stable condition.

Police were looking for video of the incident.