The nine flatmates at the address were "difficult to deal with" and claimed they did not what know their responsibilities were.
They initially denied any wrongdoing before eventually admitting that they had done ''everything wrong'' and the party got out of control, Snr Sgt Bond said.
The decision to host such a large party was an act of ''blatant stupidity'' given the recent locations of interest being in the student area, he said.
Police will return today to speak with all occupants once they have sobered up.
Investigations are still ongoing and decisions about who will be held responsible are yet to be made but police have also referred the flatmates to the Proctor's office in the interim.
Shortly afterwards police attended a party at a Pitt St address where about 50 people were present in a small garage and on the street.
There were no efforts being made to comply with Covid-19 protection framework regulations and police noted poor attitudes from occupants.
Police will also visit this flat when they have sobered up and have referred the flatmates to the Proctors office.
However, Snr Sgt Bond hailed the responsible attitude of students in the Castle St area after an ''extremely quiet night''.
No large parties were held in the vicinity and police would like to thanks residents who cancelled a party which was scheduled to be held at a Castle St address.
