People have posted on social media that they are locked inside the shops in the mall where the shooting allegedly took place. Outside the business complex, police cars, fire trucks and ambulances were seen circling every exit.
Oak Brook police said a security officer working on a holiday detail at Nordstrom heard gunshots just after 6pm and immediately called the incident.
Police say the two exchanged fire with each other in the sidewalk on the east side of the mall adjacent to Northstrom.
Police said four people were injured in the shooting. One of them is believed to be one of the suspects involved in the shooting. Police said they believe the other three may have been the target of the shooting.
WATCH: The witness described the shooting at the Oakbrook Center
Police said not everyone had life-threatening injuries. They were taken to local hospitals for treatment.
Police said the suspect was over 30 years old and had undergone several surgeries. The other three victims were two women in their 40s and a woman in their 20s.
In addition, a 20-year-old woman turned her ankle to escape the shooting and was taken away for treatment for an ankle fracture.
Another suspect was arrested after he tried to run into Nordstrom and escape, police said.
Police are currently clearing the mall shop-wise, and are investigating whether a third suspect may still be in hiding. Police said he was wearing a blue puffy coat.
Two weapons were recovered. Police said both were handguns.
Each store was searched individually by Swat and those inside would be allowed to go home.
About 100 officers from various area law enforcement agencies responded to the business complex Thursday night.
A witness told ABC7 I-Team that the shooting began during a confrontation between four men who were arguing with a fifth individual.
“I was arguing with them, it was four and one,” the witness said, asking them to remain anonymous for their personal protection. “The group of four was like, ‘Then show us, you got nothing.’ Then I was five feet away from them. I turned around and the guy started shooting at them.”
Despite the initial panic of the shooting, the widespread mood of the scene after the shooting was calm, with the police working properly and the shopkeepers usually patiently waiting for their turn to leave.
DuPont County Board member Pete Tiziani said he was shopping nearby at the time of the shooting and saw police response. He asserted that his confession had been obtained through torture, and that his confession had been obtained through torture.
Eyewitnesses said the mall was overcrowded with last-minute Christmas shoppers at the time of the shooting.
Family members rushed to the mall to meet their loved ones once the lock was removed, although police did not say how long it would take.
The last shooting at the Oakbrook center was nine years ago, Oakbrook police said, when a security officer opened fire during the confrontation.
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