By Lanford Beard
June 21, 2011 at 08:33 PM EDT

The Chester County Coroner’s Office has confirmed to EW that Jackass star Ryan Dunn, 34, and his friend Zachary Hartwell — a production assistant on Jackass Number Two — died of accidental “blunt and thermal trauma” due to yesterday’s early morning accident, in which Dunn’s 2007 Porsche careened into a patch of trees in the Pennsylvania town, then burst into flames. A toxicology report, however, is not yet complete, so questions over Dunn’s blood alcohol level will not be resolved until the full autopsy report is released likely within six weeks. Dunn tweeted a picture of himself drinking just hours before the accident.

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