A burned big rig slowed traffic along southbound Interstate 5 north of Redding Thursday afternoon.
The fire was reported around 12:45 p.m. just north of the Pit River Bridge in Shasta County.
One lane of traffic is open at the scene. The fire started in the cab of the truck and quickly spread.
The scene is just south of the Turntable Bay on-ramp to the interstate.
KRCR News Channel 7 is monitoring the situation and will bring you new information as it comes in.