According to RCMP, police immediately responded, however while en route additional calls were received that the eastbound vehicle had hit a westbound SUV causing a head on collision, west of the Monarch turnoff.
RCMP say the driver and lone occupant of the vehicle at fault, was airlifted to Calgary with serious injuries. The driver had been traveling east in a westbound lane. Two occupants of the SUV were taken by ambulance to Calgary with serious but non life threatening injuries
Traffic was rerouted for several hours while the RCMP, Fire and EMS attended to the injured and began an investigation. A collision analyst also attended to conduct a scene examination.
The collisions remains under investigation.