300,000 Victorians in lockdown.
More than 300,000 Victorians in suburbs at the centre of a COVID-19 outbreak have been sent back into lockdown and told they aren't welcome in other states.
Stay-at-home orders have been reintroduced for 10 postcodes in Melbourne's inner north and west from Thursday until at least July 29, after a 15th consecutive day of double-digit case increases in the state.
People living in those neighbourhoods will only be allowed to leave home for work, study, essential shopping, exercise or to receive or give care.
Police will be patrolling the streets and screenings residents entering and leaving the postcodes.
The current COVID-19 figures.
Prime Minister Scott Morrison said he backed the Victorian government's drastic measure.
"Where outbreaks do occur you need to move on them as the Victorian government is and they have our full support with that," he told Nine.
Meanwhile, NSW has announced Victorians from the 10 postcodes could face six months in jail or fines of up to $11,000 if they try to cross the border.
Queensland is banning all Victorians from entering the state but welcoming other visitors from July 10.
South Australia has shelved plans to reopen its Victorian border but is weighing up a travel deal with NSW and the ACT.
There were 87 new cases across the country on Wednesday, and there are more than 350 active cases currently in Victoria.
Other states divided over taking on Victoria's international arrivals.
Interstate premiers are divided on accepting international flights diverted from Victoria, with SA's Steven Marshall saying the rest of Australia will "take the strain".
But NSW Premier Gladys Berejiklian says her state is not keen to take additional international flights redirected from virus-hit Melbourne, and that they should instead go to other capital cities such as Adelaide or Perth.
Queensland has indicated it will also take international flights diverted from Victoria.
Mr Marshall says it's perfectly reasonable for the Victorian government to suspend international arrivals, as it deals with a worrying spike in coronavirus cases.
He says SA has already done an extraordinary job in handling the repatriation of about 800 Australians and Health Minister Stephen Wade says the state is ready to accept more.