The Los Angeles coroner studying the death of actor Paul Walker has revealed he still hasn't been able to identify if the star was the driver or passenger of the wrecked Porsche Carrera Gt.

Autopsies on the Fast and Furious star and his friend and business partner Roger Rodas have been completed but final results are not yet available, and the final identification of the bodies will not begin until Tuesday (03Dec13), according to the Los Angeles Times.

Craig Harvey of the Los Angeles County coroner's office tells the publication, "No results will be released until at the earliest, tomorrow."

Meanwhile, detectives investigating Saturday's (30Nov13) fatal crash have still not determined what caused it.

It is believed Rodas was behind the wheel of the sportscar when he lost control and the vehicle collided with a lamppost and a tree and burst into flames.