The helicopter was a Eurocopter EC130 flying for Papillon Grand Canyon Helicopters of Boulder City.
The Grand Canyon National Park in northern Arizona, April, 12, 2015.
Authorities said all four were level-1 trauma patients.
A helicopter operated by a Boulder City-based tour company crashed Saturday evening in the Grand Canyon, killing three and critically injuring four, according to police.
"It's just frightful", witness Teddy Fujimoto said. "It is too windy and it's dark and the area is very rugged". The identities and nationalities of the dead and injured weren't immediately released.
Crews will work Sunday to retrieve the bodies of those who died in the crash, Bradley said, but weather conditions were hampering efforts.
The helicopter had been carrying a pilot and six passengers.
The spokesperson, Allen Kenitzer, said the aircraft sustained substantial damage and that the FAA and National Transportation Safety Board will investigate the crash.
He added, "The only access to the crash site area is by foot on a 20-mile hike or by helicopter".
February 10, 2018 (Gephardt Daily) - Three people are reported to have died Saturday afternoon when a tour helicopter carrying six people and the pilot crashed near the Grand Canyon.