One person was airlifted to hospital on Wednesday after a rollover north of Calgary.
It happened in the area of Highway 22 and Highway 582, west of Didsbury, at around 3:50 a.m.
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According to EMS, four people were in the truck when the rollover occurred.
STARS Air Ambulance said one man, in his mid-20s, was taken to the Foothills Medical Centre in serious, potentially life-threatening condition.
The town of Didsbury is located about 80 kilometres north of Calgary.