Australian capital Canberra goes into snap lockdown
The lockdown was called for the whole of the Australian Capital Territory – home to around 400,000 people – because authorities do not know how the infected person caught the virus.
Residents will only be able to leave home for essential reasons, BBC reported.
Australia is struggling to get on top of the highly infectious Delta strain, which has resulted in two of its largest cities – Sydney and Melbourne – going into strict lockdowns.
Large parts of New South Wales are locked down, and in Victoria there are similar restrictions on Melbourne for at least another week.
Extra military reinforcements could be called upon to ensure compliance with lockdown rules in Sydney, the New South Wales state government said.
Some 580 unarmed army personnel are already assisting police in enforcing quarantine orders in areas of Sydney.