Trooper Bill Flick says the semi-trailer was hauling steel coils on state Highway 37 about 8:30 p.m. Monday when it rounded a curve and a nearly 44,000-pound coil came loose from the trailer and crushed the vehicles. He says the truck and cars didn't collide.
The accident took place about a mile north of Orleans.
The department said Tuesday the coil struck a pickup truck driven by 22-year-old Zachary Staggs of Bedford, killing him and 21-year-old Shannon Steele of Jasper and injuring 11-year-old Mackenzie Taylor. She was taken by helicopter to Kosair Children's Hospital in Louisville, Ky., where she was listed in fair condition.
The coil also hit a car, killing the driver, 41-year-old Michael Daugherty of Mitchell.
The semitrailer driver was given a ticket for having the coil improperly secured.
The Associated Press contributed to this report.