ROSELAWN, Ind. (CBS) -- Indiana State Police late Thursday were investigating the shooting of a semi-trailer truck driver on I-65 near Roselawn.

Around 4:45 p.m., Indiana state troopers were called to the southbound lanes of I-65 in Jasper County, six miles south of the Roselawn/Demotte exit to State Road 10.

State Police said the truck driver was headed down the road when he suffered a potentially life-threatening gunshot wound.  

Responding troopers rendered first aid until paramedics came, and the victim was taken to Indianapolis in a medical transport helicopter.

Traffic was closed in both directions after the shooting and reopened by 8 p.m.

State police said the investigation was ongoing Thursday night.