Rescue efforts are continuing at Newmont's Red Chris gold and copper mine in British Columbia where three workers are trapped underground.

A rescue operation is underway at the Red Chris gold and copper mine to reach the trapped miners, who were safe in a sealed chamber underground, according to officials.

Mining major Newmont is continuing rescue efforts to reach three workers trapped underground at the Red Chris mine in British Columbia, following two fall-of-ground incidents that have blocked access with as much as 30 m of rock and debris.

Rescue efforts continue on Thursday after a fall of ground incident on Tuesday morning that left three contractors stranded.

Newmont's Red Chris gold and copper mine in Canada's British Columbia were rescued after more than 60 hours underground.

The company said that the three trapped workers are business-partner employees, two from British Columbia and one from Ontario. They were working more than 500 meters (more than a quarter-mile) past the affected zone when the first rocks fell, and were asked to relocate to the refuge before the second rockfall.

Newmont (NYSE, ASX: NEM; TSX: NGT) is working to restore communications with three workers trapped underground at its Red Chris mine in northwest British Columbia after contact with them

Three workers trapped at a gold and copper mine in Western Canada have been rescued after more than 60 hours underground.