The California Highway Patrol says it initially responded to a solo vehicle crash on the 10 Freeway at Arlington Avenue at about 3:30 a.m. but soon other vehicles crashed at the scene creating a big pile-up of wrecked cars.
One person was trapped inside their vehicle and died from their injuries, according to CHP.
Another 6 people were transported to the hospital in various conditions.
The crash forced all traffic lanes of the 10 Freeway to be shut down in the area for several hours. They reopened just before 6:30 a.m.
No further details were immediately known. The cause of the crash is under investigation.