Three people were killed and one person was injured when a sightseeing helicopter crashed near a music festival in Arkansas on Sunday, state police confirmed.

Authorities in Franklin County were alerted Sunday evening that a helicopter giving tours of the area had vanished and was overdue from a trip.

A subsequent 911 call reported a helicopter crash near Ozark. There were four people aboard the aircraft.

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An Arkansas State Police spokesman told Fox News on Monday rescue personnel recovered one survivor from the crash site and confirmed three fatalities. The survivor’s condition, and whether the person was a pilot or a passenger, was not immediately clear.

A spokesman for the Federal Aviation Administration told Fox News on Monday that preliminary information shows a Robinson R44 helicopter crashed under unknown circumstances in the vicinity of Mulberry Mountain.

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Local media reported the helicopter was giving a tour as part of the Backwoods Music Festival this weekend. The helicopter’s owner, Tulsa County Helicopters, did not immediately return Fox News’ request for comment Monday.