A final call will be made on a potential end to Victoria's lockdown on Wednesday as authorities consider building a Howard Springs-style quarantine facility near Melbourne.
Premier Daniel Andrews reported two new locally acquired COVID-19 cases on Tuesday, the fourth day of the state's five-day "circuit breaker" shutdown.
Both are household contacts of confirmed cases linked to a family function at a Coburg venue on February 6. The event was attended by an infected hotel quarantine worker.
"I will make it clear they did test negative some days ago. They've been isolating and, as a result, there's no further exposure sites," Mr Andrews told reporters.
It brings the size of the Holiday Inn outbreak to 19, although Mr Andrews indicated the new cases would not necessarily hinder the chances of lifting the lockdown on Wednesday night.
"You'd always prefer no new cases but it is fair to say that with just two contained additional community cases today, this strategy is working," he said.
"We are well placed to be able to make changes tomorrow night."
The premier also announced Victorian authorities are assessing the viability of a purpose-built quarantine centre after the Melbourne Airport hotel leak.
It would be based on the Northern Territory's Howard Springs model, with guests kept in separate cabins with more fresh air than quarantine hotels.
"There would be not zero risk but lower risk," Mr Andrews said.
Avalon Airport and Melbourne Airport were potential site candidates, he added.
"That work is ongoing and a delegation of senior officials will go to the Northern Territory as soon as is practicable to see firsthand how the Howard Springs facility is set up.
"There is a compelling argument for this, not just in Melbourne, not just in the Northern Territory."
Two new cases were also confirmed among returned travellers on Tuesday as another Holiday Inn quarantine hotel is evacuated while water damage is repaired.
Thirty-one guests of the Holiday Inn on Flinders Lane are being moved after sprinklers were activated on the hotel's fourth floor at the weekend, causing damage to half the eight levels.
The hotel is a "hot hotel" accommodating returned travellers who have tested positive for COVID-19 or are presenting with symptoms, as well as those with complex medical needs.
Along with staff, the guests will be transferred to the Pullman Albert Park Hotel, which previously housed international arrivals in town for the Australian Open.
"(It) was assessed by ventilation experts and determined as the most suitable hotel within CQV's current hotel stock to accommodate symptomatic and positive residents," a COVID-19 Quarantine Victoria spokeswoman said.
"Strict infection prevention and control measures will be followed during the transfer to ensure the health and safety of residents, staff and the community."
Australia's Deputy Chief Medical Officer Michael Kidd said it was important authorities act quickly.
"I'm sure this will be carried out very carefully and appropriately, making sure that all the appropriate security measures are in place, to make sure that we don't see any transmission of COVID-19 occurring while these folk are moved from one hotel to another," he told Nine's Today Show.
He would not be drawn on whether the state should extend the five-day lockdown.
Overnight, two locations were added to Victoria's growing list of public exposure sites.
They are linked to Monday's case of a COVID-positive woman who worked at psychiatric wards in Broadmeadows and Epping.
Almost 24,000 people were tested for the virus on Monday. There are now 25 active cases across the state.
.png?w=600)
