Earlier Monday morning, Ryan Dunn from the cast of MTV Jackass died in a horrific car crash.
Reports say he was driving his Porsche -- when he lost control, veered off the road, and crashed in a wooded area in Pennsylvania ... killing Dunn and an unidentified passenger.
When officers arrived to the scene, the car was engulfed in flames. The charred remains of the vehicle were eventually towed away.
Cops are investigating the cause of the accident -- but officials believe speed and alcohol may have been a factor.
One of the friends says Dunn had 3 Miller Lites and 3 "girly shots" between 10:30 PM and 2:10 AM -- nearly a 4 hour span -- but he was "not too drunk to drive."
But according to another person who was inside the bar that night, Dunn was "wasted" -- and "had a lot to drink."
The Chester County Coroner is currently conducting an autopsy on Ryan Dunn ... to determine, among other things, if alcohol played a role in the "Jackass" star's death.
In addition, TMZ reports, the coroner is performing an autopsy on Ryan's unidentified passenger -- who was also killed in the fatal car crash this morning.
Friends claim Ryan had upwards of six drinks before getting behind the wheel ... and driving off a Pennsylvania highway.
So far, no word on when toxicology results will be released.
But if this could teach a lesson to any of us, it's to please don't drink and drive....
Our condolences to the friends and family of Ryan Dunn. RIP