A suspect who left the scene of an accident on the Eisenhower Expressway is in custody and being treated at a hospital.
Police say the two-vehicle crash took place early today on the Ike near First Avenue.
When officers stopped to check for injuries they were told one person had left the scene and that he had a gun.
As police were pursuing the man one officer fired a shot but no one was hit by gunfire.
The suspect is now being treated for injuries he suffered in the accident.