Oxford County Ontario Provincial Police are investigating a robbery at the Princeton Variety store in Blandford-Blenheim Township.

Shortly before 9 p.m. Saturday, police say a lone male walked into the store and approached an employee, threatening him.

Police say he demanded money and brandished a knife.

The employee chased the suspect out of the store as he fled on foot, according to police.

The suspect is described as a white male, between the ages of 19 and 30-years-old. He has a slim build and was seen wearing a one piece blue overalls with grey at the chest and shoulders, a dark open faced balaclava, with dark shows and a black backpack.

Anyone with information is asked to call Oxford County Crime Unit at 519-688-6540, OPP at 1-888-310-1122 or Crime Stoppers at 1-800-222-8477 (TIPS).