17 hurt in foggy 20 vehicle pileup in Cajon Pass

California authorities say that several people were injured in a serious multi vehicle pileup that happened in foggy conditions on I-15 in Cajon Pass.

The crashes began around 10:40 a.m. in the southbound lanes of I-15 (15 Freeway) between Oak Hills and Highway 138. The number of vehicles involved remains unclear, but a California Highway Patrol spokesperson told KTVU that it could be as many as 20 vehicles. In images captured at the scene, you can see that several commercial vehicles were involved in the crash.

Motorist Darren Corrigan shares this video of the crash in the Cajon Pass moments after it happened. You can still hear the crash happening. pic.twitter.com/MEwffXog36

— Leticia Juarez (@ABC7Leticia) May 30, 2018

Ten people were taken to the hospital for treatment of non life threatening injuries. Seven others were treated at the scene for minor injuries.

The cause of the pileup crash is still under investigation, but authorities say that dense fog caused close to whiteout conditions.

Your current driving conditions on hwy 138 and 15 fwy in Cajon pass. Turn on your hazard lights and headlights. Also, SLOW DOWN!!! #dontcrash pic.twitter.com/TPtu8Z8ksK

— Sgt. Marc Bracco (@SBCSDmbracco) May 30, 2018

All lanes of southbound I-15 reopened around 3:20 p.m., but serious traffic backups have been reported in the area.