City police are looking for a man following a string of break-ins on the city's south side.
The crime spree started at the beginning of January and so far more than 30 businesses have been victimized.
Police say the culprit usually strikes in the early morning hours, smashing the glass of the buildings entrance. He then makes off with cash and, in some cases, small electronic devices.
The thief is described as a Caucasian man with a medium build, who wears a tan work jacket and light coloured hoodie.
Anyone with information on these crimes is asked to contact Thunder Bay Police Service.
(Thunder Bay Television)