Armed Crime Task Force detectives are today appealing for fresh information following an armed robbery at the Manningham Club in Bulleen last month.
Police have released images of two men they believe may be able to assist with the investigation.
Detectives have been told a man wearing a beanie entered the Thompsons Road premises about 1.30am on Saturday 15 September.
Two more men then entered the premises through the same door, armed with firearms and wearing balaclavas.
Police have been told the first man then put on a similar balaclava.
A fourth man was unable to gain entry and began using a baseball bat to break the front window.
Once inside, all four offenders then threatened staff and patrons.
One of the men stole an amount of cash and all offenders left the scene through the broken window.
Police believe the offenders fled in a vehicle in an unknown direction.
One staff member was injured during the incident.
He was taken to hospital with minor injuries.
All of the offenders are described as being aged in their 20s and slim to medium build.
They were all wearing dark pants and hooded tops, balaclavas and gloves.
One of the offenders had long straight black hair and was wearing a beanie.
Police have been told another offender had facial hair and a goatee, which could be seen under his balaclava.