Authorities said they tried to stop a vehicle with Texas plates for a traffic violation at about 10:30 p.m. Thursday.
A man then got out of the car with the firearm. Police shot the man several times.
He was transported to a local hospital, where he was listed in critical but stable condition.
Police arrested two other people who were inside the vehicle. No officers were injured in the shooting.
The shooting was under investigation.
City News Service contributed to this report.
