Naugatuck police responded to an armed robbery at the “Shop and Save” convenience store on Spencer Street just after 9am Saturday.
Authorities say the suspect threaten the clerk with a knife, stole money and fled to a get-away vehicle on Lewis Street.
The man is described as white, 5ft 7in to 5ft 10in tall, wearing a black long sleeve shirt, dark pants, a black hat and sun glasses.
The vehicle the suspect fled in may have been a Black Toyota.
The driver is described as white with dark curly hair.
Anyone with information is asked to contact the Detective Bureau of the Naugatuck Police Department.