Traffic on southbound Interstate-5 is slowing due to a crash involving two big rigs.

According to the California Highway Patrol, two big rigs collided just before 7:30 Tuesday morning. 

One of the big rigs was hauling lumber, while the other was carrying hazardous materials. Those hazardous materials have been secured.

The CHP says the No. 4 lane of the I-5 has been closed off and the off-ramp to the Lebec rest area has also been closed. 

No injuries have been reported.