Three people were killed, and four have been left in critical condition after a helicoptor crashed in at a popular heli-skiing resort. 

The fatal crash happened on Monday afternoon, north of Terrace, British Columbia, as Northern Escape Heli-Skiing confirmed the three deaths on Monday evening.

A total of three choppers were running a 'heliskiing operation in the mountain back country with numerous people on board each helicopter,' Royal Canadian Mounted Police said in a statement. 

Police also said that the other helicopters lost contact with the aircraft that was reportedly holding all seven passengers before they located the crashed aircraft.

'It is impossible to put into words the profound grief that we feel and the sorrow that our guests and our staff share. We hope you will respect the privacy of those impacted at this extremely difficult time,' Northern Escape Heli-Skiing said.

Three people were killed, and four have been left in critical condition after a helicoptor crashed north of Terrace, British Columbia. Pictured: File photo of helicoptor used by Northern Escape Heli-Skiing 

The crash occurred in a very remote location that is only accessible by helicopter.

Police and British Columbia coroners planned to fly to the scene on Tuesday to investigate further. 

The deceased have not been identified as authorities want to get in contact with their next of kin first. 

Around 4:15 pm, B.C. Emergency Health Services were notified of the crash as they dispatched three air ambulances and five ground ambulances.  

The other two helicopters helped rescue the remaining four passengers who were then taken by ambulance to Mills Memorial Hospital in Terrace and are in critical condition.

According to , Northern Health said that a Code Orange was declared at the hospital in order to make sure that there was a enough resources and staff available.

David Jephson, a member of Terrace Search and Rescue said that rescue efforts were assisted by the Joint Rescue Co-ordination Centre in Victoria and Cormorant helicopters from Comox.  

Heli-skiing is an off-trail, high altitude and intense skiing experience where people reach the top of mountains by helicopter to ski or snowboard. 

Northern Escape Heli-Skiing is run by 'avid skiers and snowboarders' who take guests on 'once-in-a-lifetime' experiences. 

There are multiple packaged to choose from on the resort's website - the Yellow Cedar Lodge Classic is priced at a little more than $8,000. 

The crash occurred in a very remote location in Terrace that is only accessible by helicopter

Northern Escape Heli-Skiing sent out a press release in regard to the fatal crash that is currently under investigation 

The Skeena Spey Riverside Wilderness & Lodge Private Package is priced at $139,999, and many of the various packages have a waiting list.  

John Forrest, the President and General Manager of Northern Escape Heli-Skiing said that the company's top priority is to focus 'on the safety of guests, staff and guides.

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'Helicopter accidents are rare but do pose a risk to people who heli-ski in the mountains and backcountry. Northern Escape Heli-Skiing takes every precaution to minimize the risks while being in the backcountry, and they do this by meeting industry safety standards,' Forrest said. 

The cause of the crash is still under investigation, and the injuries of the critically injured are unknown.