BAKERSFIELD, Calif KBAK/KBFX — The California Highway Patrol closed all lanes of I-5 just north of Lake Hughes at Castaic on Saturday evening due to a safety hazard.

CBS affiliate KCAL in Los Angeles is reporting that a shelter-in-place order has been issued to residents in Castaic after a natural gas line ruptured.

It’s unclear what caused the gas line, which is also referred to as a “transmission gas line,” to rupture, but Los Angeles County Sheriff’s Department deputies told CBS Los Angeles that it was possibly caused by a mudslide.

Drivers going northbound are being diverted to Highway 126, and southbound traffic is being diverted to Highway 138.

No evacuation orders have been issued, though LAFD firefighters say that residents living within a one-mile radius of the gas line were asked to shelter in place.

California Highway Patrol officers issued a SigAlert just after 5 p.m., closing both northbound and southbound lanes north of Lake Hughes Road.

There was no word on when the SigAlert would be lifted. No injuries have been reported.

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