RCMP said they received a call from a witness about a driver crashing into three people cycling along Highway 99 around noon on Sunday, killing two of them, along with the vehicle's sole passenger.
The condition of the third cyclist was unknown, said RCMP Staff Sgt. Steve LeClair.
"The problem is the area is relatively remote with no cell phone coverage and spotty radio reception," he said. "We do have a collision-investigation team on scene, as well as our local members and the coroner."
LeClair suggested reports the driver was impaired at the time of the crash were based on observations from witnesses and police officers at the scene.
"I don't know what the particulars of that are but I suspect it's based on their observations and their experience," he said.
One officer accompanied the driver as he was airlifted to a hospital in Vancouver.
The Mounties have not released the names of anyone involved in the accident.
The families of the two cyclists who were killed have been notified, said LeClair, but the identity of the deceased passenger has yet to be confirmed.
No charges have been laid, however, police say the investigation is ongoing.
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