Federal Opposition Leader Anthony Albanese has urged the NSW government to clamp down harder on a Sydney coronavirus outbreak, which has grown to 90 cases.
Another eight cases were reported in the 24 hours to 8pm on Monday after a record of almost 44,500 tests, Premier Gladys Berejiklian said on Tuesday.
Seven of the those cases were linked to the northern beaches cluster, and another was uncovered in a nurse transporting patients in hotel quarantine.
A decision will be made on gatherings for Christmas day when the NSW government cabinet meets on Wednesday.
"We'll be looking to make a decision tomorrow based on what we know and understand during the day ... on what the future of the situation on the northern beaches, greater Sydney, will be," Ms Berejiklian told reporters.
After a case linked the Sydney cluster emerged in Victoria, Mr Albanese urged the NSW government to take stronger measures to clamp down on the outbreak.
"The NSW premier must respond to health advice and must ensure that health comes first before anything else," he told reporters.
"It's very clear that, when that hasn't happened, then things have gone wrong."
The opposition leader also lambasted Prime Minister Scott Morrison for leaving quarantine up to the states.
He said the federal government should set up more quarantine places and take responsibility for issuing visas for flight crews, some of whom are suspected of breaching quarantine.
"For too long, Scott Morrison has passed off responsibility to the states, being prepared to take credit whenever something goes right, but not being prepared to show the national leadership that is required," Mr Albanese said.
"This outbreak is a wake-up call yet again that Scott Morrison needs to show leadership when it comes to these issues."
A 15-year-old Melbourne girl who tested positive after visiting Sydney has put the Victorian government on alert.
Health Minister Martin Foley said there were no known exposure sites on the Victorian side of the border and close contacts of the family were being contacted.
"It is pretty clear that what the first known seeding of a case from the north shore, or from the northern beaches into Melbourne, indicates the risk," he told reporters on Tuesday.
"And it's also a message to all of us that this is not over. Eternal vigilance is the price of staying COVID-free."
Meanwhile, the borders have now slammed shut to Victorians and Queenslanders trying to get home from greater Sydney.
A brief grace period expired for Victorian and Queensland residents coming from greater Sydney and NSW hotspot areas at midnight and 1am AEDT on Tuesday respectively.
There were reports of long traffic queues southbound on the Hume Highway at Albury and northbound on the M1 at Tweed Heads on Monday afternoon, just hours before the border closures.
Those who successfully crossed in time weren't required to enter mandatory hotel quarantine, but must isolate at home for 14 days - including Christmas Day.
People from greater Sydney are currently banned from visiting every state and territory in Australia.
Those who do decide to travel interstate must undergo mandatory 14-day hotel quarantine on arrival.
