A mass shooting at an In-N-Out restaurant in Twin Falls, Idaho, left three people dead and seven others wounded. This was reported by Qazaqyia.kz citing Associated Press.

Police Chief Matthew Hicks said the suspect, 24-year-old Chad Williams, died of a self-inflicted gunshot wound on Sunday. Investigators are confident he acted alone in the shooting Saturday at the In-N-Out in Twin Falls.

Video from a witness shows a person in black with a long rifle approaching a white car, opening the driver's door, and popping the trunk. According to the chain's owner, an employee was among the dead.

Chief Hicks said an off-duty state trooper and a civilian fired at the gunman and diverted him. Williams' family is fully cooperating with the investigation.

Twin Falls is a city in southern Idaho with a population of about 56,000. Investigators are now trying to determine a motive.