A massive police presence was seen at about 8:15 p.m. near Madison and State Streets.
One witness told ABC7 it involved a security guard who was injured during a fight with a suspect.
Chicago police confirmed a 38-year-old man was battered when he tried to prevent a theft by a 22-year-old male suspect.
The situation appeared to unfold inside the Target store on State and Madison streets on the first floor near the escalators, witnesses told ABC7.
The 38-year-old had a laceration to the back of the neck and was taken to Northwestern in good condition.
One witness visiting from Houston described what he saw: "The guy was just acting crazy. They were fighting. At first, they were fighting, and they got down with it. They were tussling. The security guard took him," the witness said. "Employees, they were doing their jobs. They separated us. They were getting everybody out, and you can the officer on the ground."
Large Chicago police presence seen near Target store in the Loop
Chicago police said the suspect was not injured and was placed into custody.
CPD Area Three are investigating.
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