BOISE, Idaho (AP) — Two chief warrant officers killed when their Apache attack helicopter went down during a training mission near the Boise airport died of blunt force trauma due to the crash.

The Idaho National Guard on Monday released the Ada County Coroner's report about the Thursday crash that killed 50-year-old Stien P. Gearhart and 43-year-old Jon L. Hartway. They were the only two soldiers aboard the aircraft. Guard spokesman Col. Tim Marsano says the crash remains under investigation. Funeral services for Gearhart are planned for Wednesday, while services for Hartway are set for Friday.

Services for each will be followed with interment at the Idaho State Veterans Cemetery. Both were assigned to the 1-183rd Attack Reconnaissance Battalion headquartered at Gowen Field in Boise. Gearhart lived in Meridian and Hartway lived in Kuna.