NSW has recorded eight new locally acquired virus cases, including the three cases flagged on Wednesday that ended a streak of 12 days without any community transmission.
NSW Health said four cases in overseas travellers in hotel quarantine were also diagnosed in the 24 hours to 8pm on Wednesday, bringing the total number of cases in NSW to 4072.
One case was locally acquired with the source under investigation while the remaining seven were locally acquired and linked to a known case or cluster.
There were 12,498 tests reported in the 24-hour reporting period, compared with 5970 in the previous 24 hours.
NSW Health said one of the new cases was likely to have been infected some days ago and appeared linked to the Liverpool Hospital Dialysis cluster. Four more cases were close contacts of that case.
One new case is locally acquired whose source is under investigation. The remaining two cases today are close contacts of this case.
A known case travelled on a train last Saturday that left Parramatta station at 7:13pm and arrived at Milsons Point station at 8:04pm.
Anyone who caught the train at this time is considered a casual contact and must monitor for symptoms and get tested immediately if they develop. After testing, they must remain in isolation until a negative test result is received.
Premier Gladys Berejiklian said it was likely other venues would come to light later in the day.
“We anticipate that because we’ve identified these eight cases, that a number of close contacts and family members could be found to be positive as a result, so it’s really, really important for everybody to stay on high alert,” she said.