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: Fire Damages Commercial Structure In Arden-Arcade

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

READ MORE: Gov. Newsom Pardons Woman Sentenced To Life In 90s For Fatally Shooting Abuser

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

MORE NEWS: Kings Run Away In 4th, Top Heat 81-64 At California Classic

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