Three Catholic schools in southwest Sydney have closed and are undergoing a deep clean after four children tested positive for coronavirus.
All four of the new cases are associated with the Thai Rock cluster, with two linked to the Our Lady of Lebanon church, according to NSW Health.
Two of the cases attended Cerdon College in Merrrylands.
One of the cases attended Mary Immaculate Catholic Primary School in Bossley Park and the fourth is a student at Freeman Catholic College in Bonnyrigg Heights.
The schools are closed while contact tracing and deep cleaning is underway.
All other children, staff, and families of those who attend or work at these schools are encouraged to seek testing.
NSW records seven new coronavirus cases
Seven new cases of COVID were reported in NSW in the 24 hours to 8pm on Thursday from a record 36,169 tests, with three people currently in intensive care.
Of the seven, six are associated with the Thai Rock restaurant in southwest Sydney's Wetherill Park - taking the size of that cluster to 52.
The other case remains under investigation.
The four students who tested positive to COVID-19 were not included in Friday's numbers.
NSW Health's Dr Jeremy McAnulty said a previously-confirmed COVID-19 case had visited Costco supermarket at Marsden Park on July 19. Any Costco shoppers on that date have been encouraged to seek testing if symptoms develop.
The Crossroads Hotel cluster in Casula remains at 56 people.
An aged care facility in Sydney's inner west, Ashfield Baptist Homes, has also been closed to visitors after a staff member connected to Thai Rock tested positive.
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