A police investigation has found a Catholic girls' school in Sydney's north west did not breach COVID-19 public health safety orders.
There are now 21 cases linked to the Tangara School for Girls in Cherrybrook.
NSW Police were looking into reports of extra-curricular activities not allowed under current rules.
The independent Opus Dei religious school's senior campus is closed until August 24 while all students and staff isolate and get tested.
Meanwhile, two other Catholic girls schools — St Vincent's College at Potts Point and Our Lady of Mercy College at Parramatta are also closed for cleaning after students tested positive.
Health authorities in NSW on Friday confirmed nine new coronavirus infections.
Of the nine new cases, five were locally acquired and linked to known cases and one was locally acquired without an identified source at this point.
Three are returned travellers from overseas.
NSW Health's Jeremy McAnulty said one of the cases was an employee at Dooleys Catholic Club in Lidcombe, who tested positive after a co-worker contracted the virus.
Also among the new cases are a staff member at Liverpool Hospital and a student at Tangara School for Girls.
A total of 29,696 tests were conducted in the reporting period.
It comes as the funeral for a woman who died after contracting coronavirus took place in Sydney's west.
Jamilie Joseph, 80, was farewelled at Our Lady of Lebanon Church in Harris Park on Friday morning.
The grandmother's infection has been linked to a cluster of cases at the same church where the service was held.
Family and friends were temperature-checked before entering, while many also wore masks.
Ms Joseph is the 53rd person to die of COVID-19 in NSW.
