Credit: MTV

UPDATED: Carbon monoxide poisoning is to blame for the death of Buckwild’s Shain Gandee and two others early Monday in West Virginia.

The Kanawha County Sheriff’s Office on Tuesday said cause of death was accidental for Gandee, 21, David Dwight Gandee, 48, and Donald Robert Myers, 27. The men were found inside Shain Gandee’s Ford Bronco that was partially submerged in mud.

It was a concerned friend who eventually located the three men, all of whom are from Sissonville. Mud covered the lower part of the passenger side door, while the muffler was completely submerged, sheriffs said.

The men were last seen at a Sissonville bar early Sunday, where they talked about going four-wheeling. Family and friends searched for the men Sunday before calling 911.

Gandee’s Bronco was found next to a trail that’s passable for four-wheel drive vehicles, the sheriff’s department said. It’s also a mile from Gandee’s home near Thaxton Hollow in Sissonville. Authorities had to use a bulldozer to retrieve the car.

The bodies were taken to the medical examiner’s office, where autopsies will be performed to determine the cause of death. A family member posted a message on a Facebook page for Gandee’s General Store saying “the family feels that Shain died peacefully in his sleep without pain or suffering. That it probably was carbon monoxide. They are making arrangement now for his funeral. Nothing is confirmed but they are thinking Saturday. So private or public hasn’t been decided.” The page is also soliciting donations to help pay for burial services.

Meanwhile, production has been suspended on the second season of Buckwild, which was recently renewed by MTV. The show, which focused on Gandee and eight other carefree 20-somethings from Sissonville, averaged 3 million viewers in Jersey Shore‘s old Thursdays-at-10 p.m. slot.