RCMP have laid a dozen charges after a pre-Christmas head-on collision in southeastern Alberta that resulted in serious injuries.

The crash happened Dec. 17 when a sport-utility vehicle and a car collided on the Trans-Canada Highway near Dunmore, which is just east of Medicine Hat and about 300 kilometres southeast of Calgary.

Police say the car was travelling east in the westbound lanes of the divided highway.

Three people, who were among those injured, were airlifted to Calgary from the nearby Medicine Hat hospital for further treatment.

Curtis Beisel of Cypress County is facing eight impaired-related charges, along with another four counts of dangerous driving causing harm.

Beisel has been released on $1,000 bail and will appear in court again on Jan. 26.