MOORHEAD, Iowa (AP) – Authorities say a 52-year-old western Iowa man has been killed in a tractor accident. The Monona County Sheriff’s Office said Monday that David Moorhead was driving a tractor and hauling hay south of the town of Moorhead around 8 p.m. Friday when the tractor overturned in a ditch, pinning him beneath it. Moorhead was pronounced dead at the scene. The accident is being investigated.