Premier Gladys Berejiklian has urged residents who live, work or study in seven local government areas to "not set a foot" outside of Sydney as she foreshadowed broader lockdowns for the city after another 12 cases were recorded in NSW and exposure venues spread past the hotspot areas.
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Can I stress very strictly if you live or work in those seven local government council areas (City of Sydney, Woollahra, Waverley Randwick, Canada Bay, Inner West and Bayside) to not leave Metropolitan Sydney under any circumstances," the Premier said.
"We do not want this virus transmission in our regions. We do not want this virus to spread beyond the suburbs and local government areas where it's particularly circulating."
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Ms Berejiklian said a crisis cabinet meeting would be held on Saturday, and foreshadowed the seven-day lockdown - which began overnight - could be expanded to more local government areas in Sydney.
"The case numbers have been consistent with what we experienced yesterday, but the one difference that we've seen in the last 12 hours is exposure sites emerging in areas outside of those (locked-down) areas and also the potential for people to have been infectious in those areas for a couple of days," the premier said.
The list of exposure sites now includes venues in the northern beaches, Lakemba and Auburn, and another two train routes added overnight on Friday.
Some 29 cases were recorded in the 24 hours to 8pm on Friday, 17 of which had already been announced, taking the cluster to 82 cases.
However the concern of health authorities is rapidly growing, as more than half were not in isolation during their infection period.
"What we're finding is by the time we've got to some of those cases, they've already on-transmitted," Chief Health Officer Kerry Chant said.
"The last thing we want to see out of this is any seeding of our rural and regional communities."
Millions of people in Sydney are already in lockdown, with people who live or work in Woollahra, Waverley, Randwick and the City of Sydney council areas will not be able to leave home for a week except for essential purposes.
These include work or education, shopping, providing care or outside exercise.
The order took effect from 11.59pm on Friday and will last until 11.59pm on Friday, July 2.
The Australian Medical Association has been agitating for a broader lockdown of the entire Sydney basin, on Friday saying the current restrictions will not be enough to get on top of the outbreak.
Australian Chief Medical Officer Paul Kelly has also extended his declaration of Sydney as a hotspot, paving the way for Commonwealth support to be offered.
Coronavirus disaster payments of up to $500 kick in seven days after a hotspot is declared.
Eligible workers left without income in the seven local government hotspot areas will be able to access the one-off payment from July 1.
Treasurer Dominic Perrottet on Friday night also said he was looking at ways to provide support of affected businesses and workers.
Restrictions remain in place for other areas of Greater Sydney as well as the Central Coast, Blue Mountains, Wollongong and Shellharbour, while those who live or work in the Inner West, Canada Bay or Bayside council areas are still barred from leaving metropolitan Sydney.
with AAP