Photo: vicpolicenews

The man entered the Neale Road shopping centre about 1.20pm on Thursday, 7 June.

He then walked into a post office and produced a firearm, demanding cash.

The man was given a quantity of money and then left the store.

No one was physically injured during the incident.

A search was conducted in the local area, however police were unable to locate the man.

Detectives are today releasing CCTV and images of a man who they believe may be able to assist with their enquiries.

He is believed to be of Pacific Islander or Maori appearance, about 175cm tall with a medium build and at the time of the incident he was wearing a dark hooded jumper and pants, with a black bandanna covering his face.

The investigation is ongoing and anyone with information is urged to contact Crime Stoppers or submit a confidential crime report at www.crimestoppersvic.com.au.