A tractor-trailer rig caught fire Saturday afternoon and blocked westbound Interstate 8.

The fire was reported at 3:53 p.m. Saturday on Interstate 8 west of Ocotillo. The California Highway Patrol and Imperial County Fire Department responded to the blaze. Westbound traffic was backed up over three miles according to reports. One lane was cleared by about 8:15 p.m. and the second lane reopened at about 9:00 p.m. Imperial County Fire was recalled to the scene at about 8:45 p.m. Saturday as well as early Sunday morning when the trailer reignited. No injuries were reported and the incident remains under investigation.