A news release from the province's Independent Investigations Office says the agency is investigating a crash that happened early Sunday morning in Langley.
The news release says an unmarked RCMP car collided with another vehicle driven by a civilian.
The driver of the other car was transported to hospital with serious injuries, while two passengers and the RCMP officer were also injured.
Four investigators from the Independent Investigations Office have been assigned to the case.
The office is not releasing any other details.