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Investigation Ongoing in Fatal Paul Walker Crash 

LatinContent/Getty Images(LOS ANGELES) -- The one-car crash that claimed the life of The Fast and the Furious franchise star Paul Walker on Saturday continues to be investigated by authorities in California.

Investigators say speed was a factor in the crash, which occurred in Valencia, about 30 miles northwest of downtown L.A.

Both Walker and the other person in the red Porsche Carrera GT -- a friend named Roger Rodas -- died in the fiery accident. Rodas is believed to have been the driver of the car.

Autopsies on both men are not expected to be conducted for a couple of days, due to the condition of the bodies. The Los Angeles County Coroner's Office says dental records are needed to positively identify the victims.

Prior to the accident, Walker had attended a fundraiser, held by the 40-year-old actor's Reach Out Worldwide charity, that benefited the victims of the recent typhoon in the Philippines.

Fans and friends, including Walker's Fast and the Furious series co-star Tyrese Gibson, gathered at the crash site Sunday to mourn his death.

Walker played Brian O'Conner in several of the Fast and the Furious films. He had been expected in Atlanta on Sunday to resume work on the next sequel in the blockbuster franchise, Fast & Furious 7, according to The Hollywood Reporter, but production was delayed by at least one day.

Director James Wan reportedly spoke with executives of the film's studio, Universal Pictures, on Sunday regarding how to proceed with the project. Fast & Furious 7 is due in theaters July 11, 2014.

Following news of Walker's death, Universal Pictures said in a statement, "All of us at Universal are heartbroken. Paul was truly one of the most beloved and respected members of our studio family for 14 years, and this loss is devastating to us, to everyone involved with the Fast and Furious films, and to countless fans."

Walker appears in two films that have yet to be released. One of them, a Hurricane Katrina-focused drama titled Hours, will open in limited release on Dec. 13. The other film, the drama Brick Mansions, does not yet have a U.S. release date.

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ABC News Radio