Police are investigating after a man used a knife to rob the Circle K Irving in Elmsdale on Friday morning.

The suspect, who is between the ages of 18 and 25, allegedly walked into the store around 12:43 a.m., pulled out a knife and demanded cash and cigarettes from the cashier.

He then jumped into an older white car with a driver and drove off.

RCMP said the car was muddy and had black molding down both sides and a trailer hitch.

The car was seen heading towards Highway 102.