AUBURN (CBS13) – A big rig that caught fire is causing a mess on westbound Interstate 80 in the Auburn area Tuesday morning.

The incident started just before midnight just west of the Foresthill Road off-ramp.

READ MORE: Two-Vehicle Collision Leaves One Trapped, Crews Work To Free Person From Vehicle

For an unknown reason, a big rig hauling alfalfa caught fire.

READ MORE: Stolen Car Chase Ends In Fatal Crash In Manteca

Caltrans crews are now working to clear the mess after the fire. Only one lane is open in the area.

MORE NEWS: Homicide In Stockton Park District Saturday Night

The roads were cleared by 7:30 a.m.