TEXARKANA, Ark. (AP) — A toxicology report says a tractor-trailer driver who died in a crash on Interstate 30 in Texarkana that also killed three other people has tested positive for drugs.

The crash last November occurred when a big rig driven by 43-year-old Vaughn Gentry of Dallas smashed into the back of a vehicle that was stopped because of a construction delay. The explosion and fire that followed killed two Hot Springs residents in the car along with Gentry and a companion in the truck

A report released by the Arkansas State Police says posthumous blood tests on Gentry revealed he'd been using cocaine and marijuana.

The crash occurred about four miles into Arkansas from the Texas border.