Federal investigators say a helicopter that crashed in Arizona, killing four people, struck a cable spanning the Verde River.
A preliminary report released by the National Transportation Safety Board says the helicopter had been flying low through a canyon on June 30 when it crashed near the town of Camp Verde.
Investigators found the helicopter lying on its side in the center of the river. A cable pulley system that sits about 50 feet above the river was found north of the wreckage.
The NTSB says the edge of the two main rotor blades had cable marks about three feet from the tips.
A final report on what caused the crash isn't expected anytime soon.
The 70-year-old president and chief executive of an Arizona restaurant group was among those killed.