NSW has announced no new locally acquired Covid-19 cases as the state continues to search for a mystery case feared to have leaked the virus from quarantine.
NSW Health revealed the promising news on Friday morning – a daily figure Premier Gladys Berejiklian earlier said she was pleased with.
Yet health authorities say they are "concerned" over the "very low" number of check ins at a restaurant in Sydney's CBD identified as an exposure site.
Anyone who visited Haymarket restaurant XOPP on April 28 between 1.30pm and 2.30pm is urged to get tested immediately and isolate until a negative result is received.
The department reiterated Health Minister Brad Hazzard's damning words on Thursday where he scolded those ignoring QR check ins.
"This highlights the need for everyone in NSW to check in and out of every venue you visit," NSW Health said.
There are more than 20 exposure sites widely spread across Sydney.
Friday's update follows two locally acquired cases on Thursday, the first identified on Wednesday.
The cases, a man and his wife from Sydney's Eastern Suburbs, are genomically matched to a returned traveller from the US in hotel quarantine.
Multiple cases could be in community, premier warns
However health authorities are still yet to determine who spread the virus into the community before infecting the couple.
Ms Berejiklian told Nine it is possible multiple mystery cases are yet to be identified.
"The only concern for us is obviously the fact that at least one person has been in the community going about their business for a few days, having the virus and not knowing they have it ... it could be more than one," she said.
The couple are infected with the B.1.617 strain prevalent in India, with experts fearing it could spread through the community more efficiently than previous strains.
There were 13,339 tests in the previous 24-hour reporting period.
New Zealand called a time-out on the travel bubble with NSW on Thursday, suspending quarantine-free travel from the state for 48 hours from Friday.
Ms Berejiklian has refused to lock Sydney down like other states have done with their capitals however tightened restrictions were introduced until Monday.
The measures include mandatory masks in indoor settings and public transport, a 20-person cap on indoor gatherings and a ban on most singing and dancing.
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