LOST HILLS, Calif. (KGET) — A head-on accident in the southbound lanes of I-5 near Twisselman Road Monday morning left two dead and has closed down several lanes, according to the California Highway Patrol incident page.

As of 4 a.m., the all southbound lanes are closed due to lumber spilled in the road, according to CHP. As of 6:56 a.m., the northbound lane reopened. Traffic is being detoured at Twisselman Road. CHP also reported 30 gallons of diesel spilled onto the road. Avoid the area if possible.

The accident happen around 3:29 a.m., according to CHP. Caltrans reported a multiple big rig collision resulting in an overturned big rig.

The Kern County Coroner’s office identified one of the victims as a 44-year-old Montclair, Calif., resident driving a Freightliner and the other as a 55-year-old Healdsburg, Calif., resident driving a Kenworth.

CHP said the Montclair resident was driving northbound and the Healdsburg resident was driving southbound. For unknown reasons, the Freightliner crossed into the southbound lanes and collided head-on with the Kenworth.

Both victims were pronounced dead at the scene.

The investigation is ongoing.