A mother of five has been identified as one of the three people killed in a highway crash Monday night near Olds, Alta.

Donna Mills of Olds was driving westbound in an Acura SUV when she collided head-on with a Ford Freestar carrying six people around 6 p.m. MT, say RCMP. The collision happened on Highway 27.

Mills was found dead at the scene. The driver and a rear passenger of the Freestar were also pronounced dead on scene. 

Three more of the Freestar passengers are in serious condition at a Calgary hospital. The sixth Freestar passenger is in hospital in Olds listed in serious but stable condition.

All were young construction workers on their way back to Red Deer, according to RCMP.

RCMP say weather and alcohol were not factors in the collision. Emergency officials say it appears the Freestar may have encroached into the westbound lane when the crash happened.

Olds is roughly an hour's drive north of Calgary.

Olds map

The collision happened on Highway 27, just outside of Olds, Alta. (Google Maps)