The other was clad in her underwear and was burned all over. "It's unimaginable, the pain".
Police chief Francis Bradley told CNN: "We are having difficulties getting the four people out of the crash site area to the hospital".
According to Bradley, rescue efforts are being hindered by high winds, darkness and extremely rugged terrain where the crash is located.
It safely landed at Quartermaster Canyon, the same location where Saturday's crash occurred, and headed back to Las Vegas at 2:20 p.m. when it crashed.
The names of the dead and injured were not immediately released.
The Federal Aviation Administration would also be investigating the crash of the Eurocopter EC130, spokesman Allen Kenitzer said.
It said it flies more than 600,000 people a year.
Mr. Robb said his heart went out to the victims.
18 killed as double-decker bus topples over in Hong Kong
Local media said it was the Asian financial centre's deadliest traffic accident since a 2003 bus accident that killed 21. While Hong Kong has a well-developed and generally safe public transportation system, fatal bus crashes have persisted.
"In the gulch, there was a helicopter, flames, smoke", he said.
The four survivors were airlifted to a Nevada hospital while crews were recovering the three bodies, authorities said. Her clothes probably were burnt off.
Fujimoto says he then saw two women: One was covered in blood and bleeding from her neck.
National Weather Service meteorologists in Flagstaff and Phoenix said wind conditions were an expected 10 miles per hour with whirlwinds miles per hour around the season of the crash.
The helicopter was operated by tour company Papillon Airways.
The survivors of the EC-130 helicopter wreck were all "Level One trauma patients", said Bradley, indicating the highest category of injury. "Our top priority is the care and needs of our passengers and our staff".
Robb added that the sheer volume of helicopters in the Grand Canyon can make flying there treacherous.