Witnesses say revellers were yelling gang references and some jumped from the balcony at Shed 20 Princes Wharf Apartments on Quay St, into acar park to try to evade police.
Police said at about 7.20pm Friday they received a report of drinks being thrown off the balcony.
When they arrived, a fight involving multiple people broke out, resulting in several being taken into custody.
Police are yet to release details on what charges have been laid.
The woman said about 15 police officers had made a barricade around the building so no one could come in and out.
Another witness said the incident started just after 6,30pm. He said police initially came to move the group from drinking outside.
Police stop people from entering or leaving an apartment block following a disturbance at apartments on Princes Wharf, Quay St. Photo / David Williams
”The police came back after they started throwing bottles and making noise.”
The fight happened when the police were on site.
One woman wanting to get back into the building was told by police to park her car but she would have to wait until she could return inside. She was not told what was happening.