The L.A. County Coroner’s Office has revealed its autopsy results on Paul Walker and friend Roger Rodas and, based on dental records, officially identified the two as having been the ones killed in a fiery car crash on Saturday.

The Coroner’s office also confirmed the speculation that Walker was a passenger in the Porsche Carrera GT and Rodas was the driver.

Per the report, Walker died from “combined effects of traumatic and thermal injuries.” The report also states that Rodas was killed by “multiple traumatic injuries.” The deaths were ruled accidental. Toxicology reports are pending and may take several weeks to complete.

The cause of the accident itself is still under investigation but speed is speculated to be a factor. NBC News reports that a law enforcement source has revealed that the L.A. County Sheriff’s Department’s preliminary assessment is that the Porsche was traveling at approximately 40 to 45 miles per hour in a 45 mph zone. Rodas apparently lost control while coming around a bend where the speed limit drops to 15 mph.