Victoria has recorded its highest day of COVID-19 growth since March.
A total of 75 new cases were confirmed on Monday morning, the biggest daily jump since March 31.
It is also the fourth biggest daily jump recorded in Victoria since the start of the virus spread.
There are now 288 active cases in Victoria.
Meantime, seven new cases of COVID-19 were diagnosed in NSW over the weekend, bringing the total number of cases to 3184. All of the new cases are those of returned travellers in hotel quarantine.
In contrast, only one of Victoria's tally was from those in hotel quarantine, with the majority coming from previously identified Melbourne hotspots.
In addition to the quarantine case, 14 were linked to known outbreaks, 37 were detected through routine testing and 23 were under investigation.
"The cases are overwhelmingly located in those hotspot suburbs," heath minister Jenny Mikakos said.
"Obviously we are concerned by the increasing numbers and upward trend.
"We've got many cases across the inner northern suburbs and the western suburbs of Melbourne, but not exclusively and it's important to reiterate to the community that you are not immune from catching coronavirus by virtue of the postcode that you live in."
Victoria's chief health officer Brett Sutton said there would be discussions in coming days about implementing new movement laws.
"It is absolutely concerning," said Dr Sutton.
"But we know what will turn this around. It's people stepping forward for testing and also isolating with symptoms.
"If you've got the symptoms, you shouldn't be going out visiting people or going to work."