State police are investigating a fatal crash involving an 18-wheeler and a van on Interstate 20 in Bienville Parish.
Troopers say a father and son were among three people killed early Monday morning after an 18-wheeler crashed into a parked van.
Troopers say the boy and his father were standing outside the van, when the truck veered off the highway. The truck driver was also killed in the crash.
Investigators say three other family members inside the van suffered minor injuries and were treated at the scene.
The victims' names have not been released.