Kris Jenner ex-husband Bruce Jenner involved in a terrible car crash on Pacific Coast Highway in Malibu at around noon Saturday and one person is dead … TMZ has learned.

Several eyewitnesses say the accident was caused when Bruce rear ended the white car and that car then went into oncoming traffic and was struck by the Hummer. Eyewitnesses say the driver of the white car — a female — died.

Law enforcement sources tell us … there were 3 vehicles involved in the crash. We’re told there were 8 people involved and all sustained some sort of injury … but one person died at the scene.

Law enforcement sources tell TMZ … Bruce volunteered to go to the hospital to have his blood drawn for blood alcohol testing. He was taken in a Sheriff’s cruiser. We’ve also learned the woman who was killed in the white car was coming to a stop at a red light when Bruce hit her. We’re told law enforcement has already determined Bruce was not speeding.

And we’re told there was a 4th car involved in the accident. The woman in the white car hit a Prius in front of her before moving into oncoming traffic.