All four people on board a helicopter died after it crashed in Canada's western province of British Columbia on Wednesday, police confirmed.

"All four of the helicopter's occupants have now been located and are confirmed deceased," Const. Krista Vrolyk said in a news release in the port city of Prince Rupert, approximately 770 km north of Vancouver.

Earlier reports said that two people were killed and two others survived in the crash.

The crash site, about 150 km northeast of Prince Rupert, is accessible by air and water only, Vrolyk said, and the Transportation Safety Board of Canada has begun an investigation into the cause of the crash.

A spokesman for the Canadian Coast Guard told CBC News that the chopper carrying four people plunged into the Kitsault River near Alice Arm around 7 a.m. local time.

This is the second fatal air accident in the province in less than a week, after a plane crash on Vancouver Island on Sunday killed five people.

(Xinhua News Agency August 7, 2008)