Four new cases of COVID-19 have been detected in Melbourne
Two men, a woman and a preschool-aged child, all relatives, have tested positive in Whittlesea, in the city's north.
Health Minister Martin Foley said it does not appear there was no incubation 'crossover' period with the city's last community case, the man who was diagnosed post-quarantine in Adelaide.
He said did not rule out a link between the cases.
Anyone who was at Jump Swim School Bundoora on May 21 between 8.35am to 10am, and Highpoint Shopping Centre on May 20, 5pm to 8pm, should be tested.
Testing hours will be extended at major sites.
Victoria's Department of Health has been notified of "two likely positive cases of COVID-19" in Melbourne's northern suburbs.
In a statement the department said a full investigation was underway and initial public health actions were being put in place.
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Both individuals are isolating and case interviews have been completed.
The department has asked the community to observe key COVID-Safe behaviours and get tested if symptomatic.
It comes as two new cases of COVID-19 were recorded in hotel quarantine in the 24 hours to midnight, bringing the total number of active cases to 10.