NORTH COUNTY, Calif.—An Amazon tractor-trailer carrying 8,000 pounds of merchandise caught fire on Interstate 15 in northern San Diego County, the California Highway Patrol (CHP) said Dec. 3.

The trailer caught fire at 7:22 p.m. Dec. 2 in the middle lanes of northbound I-15, south of Deer Springs Road, the highway patrol said. CHP officers, fire, and paramedic personnel responded to the scene, CHP Officer Hunter Gerber said.

No injuries were reported.

It was not immediately known whether any packages were damaged or destroyed.

Three lanes of northbound I-15 were shut down until 10:30 p.m., when the scene was cleared.

The cause of the fire was under investigation.

Anyone who witnessed the incident was asked to contact the CHP at 760-643-3400.