Police in the United States of America have confirmed the death of three persons in a helicopter crash on the Petit Combin Mountain in the Swiss Alps.

The Wallis Regional Police Force, in a statement on Tuesday, revealed that the B3-type helicopter crashed at a landing site during a heliski drop-off.

The statement read, “Having reached the summit of a mountain culminating at 3,668 metres above sea level, for a reason that the investigation will have to determine, the aircraft slid down the northern slope.

“On board were the pilot, a mountain guide and his four clients. Their identities have not been released.

”Seven helicopters were sent to the site as part of the rescue effort.”

The police further revealed that two injured persons were quickly treated before being airlifted to a hospital in the Wallis cantonal capital Sion, while a third person was subsequently also rescued.

The police added that three other occupants of the aircraft were unfortunately found lifeless.