Interstate 5 north of Grapevine Road has been reduced to two lanes due to a big rig truck fire, according to Caltrans.
The accident happened at around 12:30 p.m. Wednesday afternoon, according to the California Highway Patrol. Crews are working to clear the debris and truck from the roads.
Lanes one and two are currently open. CHP said traffic is backed up in the area almost to the Lebec off-ramp and to expect delays.