Credit: History Channel

Sad news for the cast and crew of The History Channel's Swamp People.

Cast member Mitchell Guist passed away Monday near Pierre Part, La., The Associated Press reports.

Suffering a fall around 9 a.m. in the St. Martin Parish area along the Belle River, Guist was experiencing what witnesses -- who called 911 -- described as seizures.

Attempts to resuscitate Guist were unsuccessful, and he was pronounced dead at a local hospital. His cause of death is not yet known.

Appearing on Swamp People alongside his brother, Glenn Guist, the reality star was one of the residents of Louisiana's Atchafalaya swamp country who took TV cameras along during alligator hunting season.