Federal authorities say they are investigating what caused a helicopter owned by a power-line company to crash Thursday in the Pocono Mountains, killing two people.

The crash occurred shortly before 7:30 p.m. in Jim Thorpe, Carbon County, according to Pennsylvania State Police Troop N and a Federal Aviation Administration Accident and Incident Notification .

The Hughes Model 369 helicopter crashed under unknown circumstances while maneuvering, according to the FAA.

A flight crew member and passenger were killed, the notification said.

The aircraft’s N-number registration listed in the FAA notification shows it is owned by Winco Inc. , a power-line services company based in Aurora, Oregon.

The aircraft’s certification for flight was valid through June 2029.

WFMZ-TV 69 reported the

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