Australia on Friday reported a student with no history of foreign travel had tested positive for the Covid-19 Omicron variant, the country's first detected case of community transmission.
The case, detected in the country's largest city Sydney, comes despite a ban on non-citizens entering the country and restrictions on flights from southern Africa, where the variant was first detected.
Australia has detected nine other Omicron cases, but all were detected in incoming travellers.
The latest case raises the possibility that Omicron may already be spreading more widely in the community.
The student's Regents Park Christian School in the west of Sydney has been closed and the family is said to be in quarantine.
Australia currently records around 2,000 Covid cases a day.
Besides vaccinations, the virus' spread has been limited by two years of border closures, lockdowns, aggressive testing and tracing as well as local travel bans.
Hospitalisation rates are currently low, and the pandemic death toll stands at 2,021.
The severity of Omicron is not yet known and it is also unclear whether it could render existing vaccines less effective.
But there are concerns the variant could be more transmissible than the dominant Delta strain.