An investigation is underway after a man was shot while driving on a Birmingham interstate.

The shooting happened about 5 p.m. Saturday on Interstate 59 near Arkadelphia Road.

The victim, the driver of a white sedan, was taken by Birmingham Fire and Rescue to UAB Hospital.

Officer Truman Fitzgerald said his injuries are life-threatening.

A motive has not been determined and no arrests have been made.

In a separate incident, police say a 14-year-old boy was injured in a self-inflicted shooting that happened at 4:38 p.m. in the 4300 block of Jackson Street.

The teen’s injuries were not life-threatening.

Anyone with information is asked to call Birmingham police at 205-254-1764 or Crime Stoppers at 205-254-7777.