Oklahoma City Police are investigating a deadly crash on Northwest expressway and County Line Road.

Officials said a box truck was at the light when a van ran into the back of the truck.

The driver of the box truck is not injured.

Officials said an adult male in the van died. The victim is not believed to be from the OKC metro, police said. 

The Westbound lanes NW Expressway at County Line Road were shutdown for the investigation but have been reopened. 

This is a developing story.