Victoria Health tweeted that the fragments had been discovered in Ringwood.
Anybody who has lived in or visited the suburbs of Bayswater, Bayswater North, Boronia, Croydon, Croydon North, Croydon South, Heathmont, Kilsyth, Kilsyth South, Montrose, Ringwood, Ringwood East, Sassafras, Tremont, and Wantirna, from April 6-9, is urged to monitor themselves.
Victoria reported no new cases of coronavirus overnight.
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