Police say a 20-year-old woman was leaving her job shortly after midnight at a hotel in Red Deer, Alta., when a man came to her driver's side door and brandished a knife.
The male forced the female to get in the passenger seat and he drove to a bank where he took her to the ATM and forced her to withdraw money from her account.
RCMP say he then took her to a rural location near Penhold where he sexually assaulted her before driving her back to Red Deer and dropping her off at a convenience store and leaving with her vehicle.
The woman's car was later recovered at a construction site and Mounties say they are looking for a white, male suspect with blonde or brown hair and tattoos on his biceps.
Because the suspect is still at large, Blackfalds RCMP are urging women to be vigilant when out at night and when possible to be accompanied to their vehicles if leaving work later at night.
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