Watch: Surveillance video of gunfight outside Avondale gas station

Guns were drawn just heartbeats after a punch was thrown.

Muzzle flashes follow. Then both men lay on the ground with bullet wounds.

One of the men, writhing in pain, continues to pull the trigger.

The scene plays out in surveillance video the Sun-Times obtained from an Avondale gas station that shows a close-range gunfight that left one of the shooters dead and three others wounded early Tuesday morning.

The video shows two men opening fire on each other at 2:44 a.m. after getting into an argument that led to one of the men punching the other in the face outside the Shell gas station at the corner of Belmont and Sacramento.

The men were part of two separate groups — totaling seven people — that arrived at the gas station in different cars, Chicago Police spokesman Anthony Guglielmi said.

Omar Campuzano, 25, was shot multiple times and was taken to Illinois Masonic Medical Center, where he was pronounced dead, police and the Cook County Medical Examiner’s Office said. He lived in Avondale.

A 37-year-old man was in serious condition at the same hospital with multiple gunshot wounds, police said.

Two other people, a man and a woman, were shot in the gun fight and drove about a block west on Belmont before being taken to Stroger Hospital. The woman, 24, was shot in the neck and the man, 20, suffered multiple gunshot wounds. Both were in critical condition, police said.

The shooting occurred less than a block from Linne Elementary School.

Two handguns were recovered from the scene. And five of the seven people involved in the incident have histories with the police department, Guglielmi said, declining to elaborate.

Members from both groups have gang affiliations, according to a police source.

Police are investigating a possible connection between the shooting and another brazen shooting that also happened on Tuesday about 12 hours later and less than a mile from the gas station.

The shooting occurred in the Irving Park neighborhood in the 3700 block of North Troy about 4:25 p.m.

“Based on what we know about individuals affiliated with the incidents and current conflicts, we are exploring whether the two are connected,” Guglielmi said Wednesday morning.

That later incident involved a dark-colored sedan that pulled up next to a 24-year-old man. Someone inside then fired shots, police said.

The man was taken by paramedics to Illinois Masonic Medical Center, where his condition was stabilized, police said. The man also had gang affiliations, a police source said.

The shooting on Troy happened less than two blocks from Grover Cleveland Elementary.

Up and down the block, parents and kids exited homes and began their days Wednesday morning.

“I hope this isn’t an indication of where the neighborhood is heading,” said one concerned mother as she walked her son to daycare.

“Getting out of the city is the safest bet if you’re trying to raise kids,” said the woman, who asked not to be named.

“We all have kids over here,” said a man who lives on the block and has two sons, ages 10 and 4. “This is not good. I hope it stops.”

Another woman who heard the shots said her thoughts immediately flashed to her two sons, ages 17 and 21, neither of whom were home at the time.

“I wanted to make sure my boys were alright, and they were, thank God,” she said. “They’re my livelihood.”