Rescue helicopter plunges down US slope

A rescue helicopter has crashed in the United States high in a mountainous region.

The US National Guard Black Hawk rescue helicopter crashed on Oregon's Mount Hood, 800ft from the peak, 50 miles from Oregon.

The rescue helicopter was on it's way to help some injured climbers when it plunged down the snow-filled mountain.

A second rescue is now underway in a bid to save the helicopter crew, after the helicopter plunged down the dormant volcano.

The frightening moment the helicopter lost control was captured by television crews in the US filming the original rescue.