Four locally acquired cases of COVID-19 have emerged in Sydney, with several suburbs on notice, as fears grow that some restrictions could be reintroduced.
Here's what you need to know.
Police investigating unvaccinated frontline worker.
On Wednesday, a man in his 60s, who works as a driver for international flight crew, tested positive after a daily saliva swab.
The exact source of his infection is still unknown.
Despite being a frontline worker, the man was not vaccinated against the virus. The NSW chief health officer Kerry Chant has also confirmed the driver has the highly infectious Delta strain.
His wife also tested positive on Wednesday.
On Thursday morning, NSW Premier Gladys Berejiklian revealed a woman in her 70s has also tested positive to the virus, after attending one of the cafes identified as an exposure site.
When Premier Berejiklian was asked why a frontline worker was not vaccinated, she replied: "This is the issue. We're waiting for police to finish their investigation...
"Every worker should be clear on their obligations," the premier added. "I expect the testing rates to go through the roof in eastern Sydney today."
A positive COVID-19 case in Baulkham Hills area.
The premier also revealed on Thursday that a man in his 40s has tested positive to the virus in the Baulkham Hills area.
This is unrelated to the Eastern Suburbs cluster.
NSW Health says this is possibly an old case, or a false positive, because the viral load in his system was very low.
Eastern Suburbs testing and exposure sites.
Both the Bondi drive-through testing clinic and the St Vincent's Hospital clinic have extended their testing hours. In light of the positive cases, hundreds of cars were seen lining up at Bondi's testing clinic.
A big shout out to the team at our Bondi Testing Clinic, who swabbed 1800 people in the hours after 4pm yesterday. If you have even the mildest of symptoms, our Bondi Beach and East Sydney testing clinics are now open for temporarily extended hours: https://t.co/v2CKgXBh7f pic.twitter.com/8HrFG2FWEN— St Vincent's Sydney (@SVHSydney) June 16, 2021