One of the stars of History Channel's show Swamp People died this morning.

Mitchell Guist -- who starred on the show with brother Glenn -- was pronounced dead at a Louisiana hospital today, Assumption Parish Sheriff Mike Waguespack tells AP.

Guist would have turned 48 on Friday.

He was loading something onto his boat when he slipped and fell around 9 a.m. on the Intracoastal Waterway, near Pierre Part, La. (about 90 minutes from New Orleans), according to WAFB. The sheriff says it appeared he had some sort of seizure, but it is uncertain if the seizure was caused from the fall.

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An autopsy will have to be performed before an official cause of death can be announced.

Swamp People features Mitchell and brother Glenn, residents of Louisiana's Atchafalaya swamp country, during alligator hunting season. The third season of the show debuted in February.

On his Facebook page, Mitchell described himself like this: "I like to hunt and fish. I like to hang out with friends. I'm just a normal dude."

Update: History and Original Media, producers of Swamp People, just released this statement: