Paul Walker Crash -- Coroner Completes Autopsy

2:35 P.M. PT -- The coroner tells us the autopsies on both bodies are now complete ... but we're still waiting to find out the exact cause of death. The findings could be announced later today. Story developing ...

We may soon know the exact cause of Paul Walker's death ... TMZ has learned the coroner's office will begin the autopsy shortly.

Law enforcement sources tell us ... the autopsies on Walker and Roger Rodas will be completed today. We're told the coroner also hopes to make positive ID on both bodies ... which was delayed because dental records were needed.

Walker and his racing partner Rodas were killed Saturday when the Porsche Carrera GT they were driving in crashed into a pole. Witnesses on the scene say it appeared both men burned to death when the car exploded in a fireball.

The cause of the accident is still under investigation.