Melbourne Crime Investigation Unit detectives are investigating five incidents in the Melbourne CBD since June, Victoria Police say.
The first incident was on 19 June about 9.40pm, a man entered an office via an open window on Rosslyn Street and stole an envelope containing foreign currency.
The second incident on 20 June, a man used a brick to smash a security camera and window of a building on Spencer Street about 10.30pm.
An alarm went off and the offender fled on foot.
The third incident was on 3 July about 2.30am, a man used a brick to smash the window of a business on Leveson Street but fled empty handed.
The fourth incident was also on 3 July about 3.20am on Frederick Way, a man kicked in a window at a business and stole a cash register containing cash.
The final incident was on 7July about 1pm on Spring Street, a man stole a bicycle from an underground carpark.
The same male is believed to have been involved in all five incidents and is described as Caucasian, aged 30-40-years-old, thin build and was wearing a baseball cap, black hooded jacket and jeans.
Investigators have released images of a man they believe may be able to assist with their enquiries.
Anyone with information or who recognises the trio is urged to contact Crime Stoppers.
