CHICAGO (CBS) — A 7-year-old boy was hospitalized after he was shot on the Dan Ryan Expressway Sunday morning.

Illinois State Police say a vehicle was traveling down I-94 near 73rd Street around 2:40 a.m. when someone in another car started shooting at them – striking the boy who was a passenger.

The driver of the struck car exited the expressway and stopped near 22nd and Michigan to call for help. The boy was taken to the hospital with a gunshot wound to the head.

State police closed the expressway's northbound lanes just before 4 a.m. to investigate. All lanes reopened around 4:53 a.m.

Investigation into the shooting remains ongoing.  

No further information was immediately available.