40/29 reports that three people were killed Sunday evening in the crash of a helicopter flying sightseers over the Backwoods at Mulberry Mountain music festival.

The helicopter is owned by an Oklahoma company that was giving tours of the festival north of Ozark. One person aboard survived the crash, but a condition wasn’t immediately known, the Northwest Arkansas Democrat-Gazette reported.

UPDATE: More from AP. The survivor is reported to be critically injured.