Victoria recorded 21 locally acquired cases in Victoria with all cases linked to recent outbreaks which extended the state’s latest lockdown.
Cases from the City of Melbourne, Glenroy, Melton South, Middle Park, Newport, West Footscray, West Brunswick and Wyndham Vale do not have identified sources of acquisition, Ms Matson said.
But in good news she said testing had been able to link a Roxburgh Park case to an outbreak at Glenroy West Primary School, she said.
The deputy secretary said Glenroy was a big focusfor health authorities and of the latest cases, 15 were cases linked to the Glenroy West school outbreak.
Two were students at the Glenroy West Primary School, one was a staff member at the school and 10 cases were linked to households.
One case is a household contact of a student previously counted as a case, and another is a student from a Laverton school who took a bus where a person on board was a previously reported case.
There were 15 local cases recorded on Friday and zero infections from international arrivals.
Victorian chief health officer Brett Sutton said four of those were “mystery cases” which was of “particular concern”.