Omicron cases are "expected to rise" in NSW as the state battles 25 cases of the new COVID-19 variant.
Chief Health Officer Dr Kerry Chant said 14 of the 25 cases are linked to the Regents Park cluster in Sydney's south west during the NSW Health Update on Monday.
"It is expected that our numbers linked to this cluster will rise as further results are confirmed," she said.
The 14 cases in the Regents Park cluster do not include an ACT resident who is believed to have acquired the Omicron variant at the Sydney Indoor Climbing Gym in Villawood on Saturday, November 27.
"The ACT has separately reported cases linked to that resident," Dr Chant said.
The remaining eleven cases are believed to be from either overseas or on an international flights.
Dr Chant said NSW Health is "continuing to investigate" Omicron cases at Regents Park Christian School, St Peters Chanel Catholic Primary School in Regents Park and the Sydney indoor climbing gym at Villawood.
"I'd just like to thank the incredible response of the school communities that have been linked to this outbreak. Thank you so much for turning up to testing and thank you so much for your commitment to following the public health advice as we aim to understand this outbreak and reduce any further spread," she said.
NSW recorded 208 new cases of COVID-19 on Monday.
The state has 152 people in hospital, 24 of whom are in intensive care.
No deaths were added to the pandemic's toll in the state in the 24 hours to 8pm on Sunday.
Vaccination rates remain stubbornly rooted just shy of the milestone to unlock additional freedoms.
The state is moored at 94.6 per cent, with 92.8 per cent of adults 16 and over fully jabbed.
Statewide, there were 61,132 tests conducted in the 24-hour period.
Of youths from 12 to 15 years old, 81.4 per cent have a first dose and 77.2 are double dosed.
Want to know more about the Omicron COVID-19 variant? Watch a video explainer here: