A civilian hunter was found dead in a Fort Stewart training area by family members around 10 p.m. Sunday after he did not return home earlier in the day.

The man was identified by the Bryan County Coroner's Office as Mark Shields, 66, of Savannah. Officials believe the man suffered a heart attack while returning to his vehicle.

Shields was not affiliated with Fort Stewart-Hunter Army Airfield.

Fort Stewart federal conservation law enforcement officers responded to the scene initially. The Bryan County Sheriff's Office and Bryan County Emergency Services also responded to the scene. 

Civilian hunters are allowed to hunt in Fort Stewart training areas after registering with installation hunting officials. Deer season is underway now.