The Sarnia Police Service (SPS) is looking for two masked suspects, accused of robbing a business on Wellington Street.
Officers were called to the Mitton Village area just after 12 a.m. on Tuesday, July 28.
Police said a man approached the victim and handed them a violent, and threatening note demanding money from the register.
A woman allegedly walked the victim to the register, made them open it, and stole several hundred dollars in cash.
Police said the suspects took off on foot about 20 minutes later, heading southbound on Wellington Street.
Patrol officers and the Canine Unit were unable to find the accused.
The male suspect was wearing blue shoes, dark shorts, a blue t-shirt, a red/orange hat, and had a green backpack, and a white mask.
The female suspect was wearing a green baseball cap, a black-and-white pinstripe jacket, a black-and-white horizontally striped shirt, black capri pants, red shoes, and a white medical mask.
She was allegedly carrying a folding pocket knife.
Anyone with information about this incident, or who may have doorbell or dashcam videos, is asked to call Sarnia police at 519-344-8861.
Anonymous tips can also be submitted to Crime Stoppers at 1-800-222-8477 or online at www.p3tips.com.
