The Bartholomew County Coroner’s office says that a soldier training at Camp Atterbury died last Friday from natural causes.

Deputy Coroner Jay Frederick said that an autopsy shows the death was caused by a heart attack.

Camp Atterbury officials reported that 43-year-old Capt. Brian A. Stillman was participating in the base’s land navigation training when he collapsed and died at about 12:30 Friday afternoon.

Stillman was from Norton, Ohio and was a 19-year-member of the Ohio National Guard. He leaves behind a wife and two children.