ANTIOCH (CBS SF) — Several lanes of state Highway 4 in Contra Costa County were blocked after a garbage truck caught on fire in the roadway Monday.

The garbage truck was blocking three right lanes of traffic on westbound Highway 4 in Antioch between the Hillcrest Ave. and the A St./Lone Tree Way exits.

The incident was reported just after 2 p.m., according to the California Highway Patrol. Westbound traffic was backed up past Hillcrest to the Antioch BART station.

All lanes were reopened as of about 3:30 p.m.

No word yet on what caused the garbage truck to catch fire. No injuries were immediately reported.