A four-day stay-at-home order for Perth and the neighbouring Peel region started at midnight, just hours after Prime Minister Scott Morrison announced new measures in the coronavirus battle.

A man in his 30s is the latest case in Perth. He worked and dined at the Indian Ocean Brewery on the same night as another positive case – a woman who travelled from Sydney. She also came into contact with a 32-year-old woman who has tested positive.

With Sydney in lockdown, NSW recorded 18 new coronavirus cases with all but one confirmed as linked to existing cases.

Queensland is on the verge of another lockdown in the state’s southeast after two new local cases, with more than 160 returned mine workers being tested.

In the Northern Territory, an outbreak linked to a central Australian mine has grown to seven cases, sparking an extension of a snap lockdown until at least Friday.

Morrison, who is quarantining in Canberra after an overseas trip, said he understood the frustration of Australians at the disruption.

“We’ve got to hang in there – we don’t have a choice.”

Australia has not had a COVID-related death this year.

Asked whether the country should learn to live with the virus in the community even if there are deaths, the prime minister said: “It would be unwise to surrender up that advantage at this point and preferably at no point, but that is a decision that will have to be made in the next year”.

-with AAP