New Mexico State Police Emmanuel Gutierrez says state troopers dispatched to Highway 187 after receiving reports of the crash Saturday afternoon in Sierra County.
Authorities say 78-year-old Duane Zietlow, of Elephant Butte; 61-year-old William Brownfield, of Caballo; and 34-year-old pilot Ebenezer Priebe, of Tucson, Ariz., died in the crash.
It was not immediately know what caused the helicopter to go down.
The cause of this crash is being investigated by the Federal Aviation Administration and National Transportation Safety Board.
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