Shain Gandee, a star of the MTV reality show "Buckwild," and two men found dead with him Monday died of carbon monoxide poisoning, autopsy results show.

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Cpl. Brian Humphreys of the Kanawha County, W.Va., Sheriff's Department said Gandee, 21, his uncle David Gandee, 48, and Donald Robert Myers, 27, had apparently died accidentally, the Charleston (W.Va.) Gazette reported Tuesday.

Shain Gandee was in the driver's seat of his Ford Bronco, which was found stuck in mud near Sissonville, W.Va., where the series is produced.