About 10 million Australians have been ordered into lockdown as Covid-19 spreads across the country, after Brisbane on Tuesday became the fourth major city to issue stay-at-home orders, APA reports citing France24.
The three-day snap lockdown for Brisbane, starting on Tuesday evening, comes on top of similar orders imposed in Sydney, Perth and Darwin residents in recent days.
"These are tough decisions," Queensland state Premier Annastacia Palaszczuk said.
"We are having lockdowns in major cities because the overseas arrivals are bringing the virus here."
Brisbane's surrounding coastal regions and the small northern city of Townsville are also subject to the latest order, after an unvaccinated hospital worker spent up to 10 days travelling around Queensland while infectious.
Australia has been broadly successful in containing virus clusters, but is now battling flare-ups of the highly contagious Delta variant, which first emerged in India, across the vast continent nation.
Perth woke to a four-day snap lockdown Tuesday morning, with the rules applying from midnight Monday into Tuesday and lasting a minimum of four days.
Just three positive cases have been diagnosed in Perth since the outbreak was detected but local health officials have long taken a highly cautious approach to any coronavirus clusters.
"We know the risk Covid presents and we know from around the world that the Delta strain is another new beast that we can't take any chances with," Western Australia state Premier Mark McGowan said in a late-night press conference Monday.