Cochrane RCMP responded to single vehicle roll over early Sunday morning.

At 3:49 a.m., RCMP were dispatched to Horse Creek Road, approximately 3 km north of Highway 1A.

The vehicle in question had been travelling north on the road when it entered the ditch, struck a guardrail and became airborne.

Two out of the four passengers were ejected from the vehicle and the female driver along with three passengers were transported to the Foothills Hospital. Three received minor injuries while one still remains in critical condition.

Though an investigation is still underway, alcohol and speed are believed to have been factors in the accident.