Rip Paul Walker

"Fast & Furious" star Paul Walker may have initially survived a horrific car crash but died moments later due to a combination of injuries from the impact and the resulting fire, according to a coroner's report.

The one-page preliminary report released by the Los Angles County coroner's office Wednesday listed the cause of the actor's death as the "combined effects of traumatic and thermal injuries."

An autopsy concluded that Roger Rodas, who was driving the red Porsche Carerra GT, suffered "multiple traumatic injuries," but it was not clear in the report if he was still alive when the car burst into flames soon after the wreck.

Since two different doctors did the separate autopsies, the difference in the description of their injuries does not mean there deaths were significantly different, Los Angles County Assistant Chief Coroner Ed Winter told CNN.

It is not known how long each man lived after the crash as the fire began, Winter said. That information may be included when full autopsy reports are released in several weeks, he said.
Actor Paul Walker dies Actor Paul Walker dies

The coroner confirmed what many witnesses told investigators: Rodas was the driver in the crash; Walker was the passenger of the high-performance Porsche that clipped a light pole and a tree before erupting in flames on a Southern California street Saturday afternoon.

The deaths were officially ruled an accident by the coroner.

'Fast & Furious' halts production

A toxicology report, which could show if drugs or alcohol played a role in the accident, will be available in six to eight weeks, the report said.

Video obtained by CNN from a security camera posted on a building on the opposite side of the street from the crash suggests that the fire that engulfed the Porsche did not erupt until about a minute after the car crashed.

In the video, which does not show the car, black smoke is seen rising from the crash scene 60 seconds after the light pole and a tree fall. Smoke is faintly visible above the scene after one minute, followed by a heavy plume of black smoke after two minutes.

The crash happened on a wide street in a business park in Santa Clarita, California, about 30 miles north of Hollywood. Walker was attending a holiday toy donation event for his charity, Reach Out WorldWide, when he hopped into the car with Rodas for a ride, witnesses said.

The Porsche, which was one of only a few hundred made, was on display at the event, which was held at a high-performance car shop owned by Rodas.

Minutes after the two men drove away, people at the event heard the crash about 500 yards away, witnesses said.

Big questions in Walker crash probe

Next 'Fast & Furious' on hold

Production of Walker's latest movie -- the seventh installment in the "Fast & Furious" franchise -- will be shut down "for a period of time," the studio said Wednesday.

"At this time we feel it is our responsibility to shut down production on 'Fast & Furious 7' for a period of time so we can assess all options available to move forward with the franchise," Universal Pictures said in a statement.