Ryan Dunn died from crash's impact, fire

PHILADELPHIA - A coroner's report says "Jackass" daredevil Ryan Dunn and his passenger died from the impact and resulting fire of a car crash in suburban Philadelphia.

The Chester County coroner Tuesday lists blunt force trauma and thermal trauma as the causes of death. Toxicology results will take four to six weeks to complete.

The 34-year-old Dunn and his 30-year-old passenger, Zachary Hartwell, were killed early Monday. Police say Dunn's Porsche might have been traveling as fast as 100 mph when it crashed.

West Goshen Township police declined to discuss the investigation.

Mourners are placing flowers at the scene of the crash in West Chester. Police say Dunn's car jumped a guardrail, flew into a wooded ravine, struck a tree and burst into flames.

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