PAULDEN, Ariz. -- The people killed in a plane crash Friday have been tenatively identified, according to the Yavapai County Sheriff's Office
They are James Parrish, 57, of Terrell, Texas, and his wife, Lisa Parrish, 54.
James was the owner of the aircraft.
Also killed were Mike Hughes, 65, and his wife, Joy Hughes, 63. They have homes in Paulden, Ariz., and Aurora, Colo.
The six-passenger Cessna 340 went down on the Gunsite firearms training academy property at about 12:30 p.m., according to the Yavapai County Sheriff's Office.
YCSO spokesman Dwight D'Evelyn said witnesses saw the plane clip some trees and then appeared to explode on impact.
Some witnesses also indicated the plane may have struck a radio tower on the Gunsite grounds.
The plane departed Bullhead City in northwestern Arizona earlier Friday. D'Evelyn said initial reports indicate the plane was expected to land at the Prescott Airport and those on board were scheduled to arrive at Gunsite later in the day.
Investigators have not determined why the aircraft was in the area over Gunsite prior to arrival at the airport.
The Federal Aviation Administration and National Transportation Safety Board will investigate the cause of the crash.