NSW Health late on Friday confirmed Regents Park Christian School in western Sydney had two more cases confirmed as the new Covid-19 strain, on top of one confirmed previously.
The cluster now has 13 Covid-19 cases in total.
“Urgent genome testing is underway on a further 10 cases,” NSW Health said in a statement.
“NSW Health is urgently investigating the source of infection for this cluster.
“The whole school K-12 has now been dismissed for the year.
“All students and staff have been identified as close contacts.”