The brothel targeted in an alleged violent break in on the weekend was also firebombed just two months ago.
Police are still hunting two men who allegedly tried to break in to the Gold Curves Studio on Wollongong Street on Saturday morning.
The men, both described as having Irish accents, rang the brothel's doorbell about 6.15am, not realising it was closed.
Police say they kicked in a rear door, and two of the owners chased the men out of the brothel to the front car park.
A brawl broke out and one of the owners was hit in the back of the head with a glass bottle.
The other owner was allegedly punched in the face.
Both owners were hospitalised after the incident, police say.
The two alleged offenders fled in an unknown direction. Nothing was stolen from the brothel.
Police this morning issued CCTV images of the two men linked to the break in, and are asking for the public's help to identify the men.
The Gold Curves Studio was also targeted in a firebomb attack in early May.
A man threw a flaming bottle at the front door of the brothel about 1.10am on May 8.
The attack did not cause substantial damage.
There is not thought to be any link between the two incidents.
The two men involved in the weekend's alleged break in are described as Caucasian, both 183cm tall with a heavy build.
One was wearing a blue t-shirt, the other was wearing a white t-shirt and blue beanie, with tattoos on both arms.
Police are urging anyone with information on their identity to contact Crime Stoppers on 1800 333 000 or via the website.