Police responded to a report of a suspicious person at about 10:30 p.m. in a strip mall parking lot in the 1200-block of West Ogden Avenue.
Police said they approached the 27-year-old man who was holding a gun. When police said he pointed the weapon at officers, they fired, wounding the man.
The man was transported to a hospital in serious but stable condition. No other injuries were reported.
A firearm was recovered from the scene. The DuPage Major Crimes Task Force and State's Attorney's office were notified of the shooting.