Update: Bruce Jenner Car Crash Investigation Underway, Reality Star 'Traumatized' -- Did Texting Play A Role In Accident?

Now police are investigating what caused the accident on the Pacific Coast Highway in Malibu and whether paparazzi, alcohol or texting played a role.

"As of right now, there is no indication that Bruce Jenner was being chased by paparazzi at the time of the crash," Los Angeles County Sheriff's Department Lt. John Lecrivain said.

"There was a possibility that paparazzi was following him at the time of the crash, but that is a very regular occurrence, and (there is) no indication at this time it was a contributing factor of the crash."

Jenner was driving his Escalade and was towing a trailer with an all-terrain vehicle when he ran into a white Lexus from behind, Los Angeles County Sheriff's Department Sgt. Philip Brooks said. The Lexus spun into oncoming traffic and was hit by a Hummer H2 and the driver of the Lexus was killed at the scene. The pile up started when a Prius stopped in the northbound lanes on the PCH, according to the Sheriff's Department.

Jenner's rep confirmed that he was not injured in the crash but gave no other details. The former Olympian cooperated with investigators and passed a field sobriety test. He also voluntarily submitted a blood sample to determine whether he was intoxicated.

"He did not appear intoxicated or under the influence of anything at the time," Sgt. Brooks said.

Police will also look at phone records to see if texting played a role in the crash, according to a report. A photo from the scene shows Jenner possibly holding a cell phone.

Five people were hospitalized with minor injuries, according to the Sheriff's Department.

Warning: Explicit language used.