Victoria has recorded just 14 new cases of COVID-19 in the past 24 hours, marking the lowest overnight rise in three months.
An additional five people have died, taking the state's death toll to 762.
For metropolitan Melbourne, the 14-day rolling average has dropped to 36.2.
Just 52 active cases between September 4 and September 17 currently have an unknown source.
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'Victorians can be proud' after case numbers reach new low
Five of today's 14 new coronavirus cases in Victoria are under investigation with no clear source yet determined, Premier Daniel Andrews said.
The nine other cases have been linked to known outbreaks.Providing his daily coronavirus update, Mr Andrews revealed that active cases across the state have fallen to 743.
There have also been five further deaths, all of which are in aged care residents.
There were no additional cases in regional areas overnight, with just 26 active cases remaining outside of greater Melbourne.
"These numbers are cause for great optimism and a positivity, I would hope, right across metropolitan Melbourne, just as regional Victoria this week has taken two big steps to open up and we're seeing stability in those numbers," Mr Andrews said.
"This is a good day though – a day where Victorians can be proud of the work they've done, their commitment, their resolve to see this off."
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South-east Melbourne family outbreak now at 40 cases
A coronavirus outbreak connected to families who broke lockdown to visit one another's homes in Melbourne's outer south-east has grown to 40 cases.
That is an additional six family members who have tested positive since yesterday.
The residents mingled with households across Hallam, Clyde, Narre Warren South and Cranbourne North, driving an outbreak in the city's south-east which has seen cases infect Dandenong Police Station and other industrial work sites.
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"So it just gives you a sense of one person, just a single person, can infect many, many other people," Premier Daniel Andrews said.
"The contact tracing work that has gone on there has seen us pull that up."
There is still, I'm sure, close contacts and others will be very much monitored to make sure that if they exhibit symptoms, that we can further isolate them – but they're all isolated there.
However, Mr Andrews said he believed the outbreak had now been contained and would not balloon beyond the close contacts who remain in isolation, but "it's always subject to and events as they unfold".
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Source: 9News https://www.9news.com.au/national/coronavirus-victoria-september-20-14-new-cases-of-covid19/9fb7bb39-971d-440c-881f-98a0419c67e9