The state of Queensland in Australia has extended the closure of its border to New South Wales (NSW) and the Australian Capital Territory (ACT) to contain the spread of coronavirus.
The order takes effect from Saturday.
Queensland had earlier already shut borders with Victoria after the outbreak in Melbourne.
Victoria reported 725 new infections on Wednesday, yet another daily record despite being four weeks into lockdown.
NSW saw 12 new infections.
Sydney has made masks mandatory in public to avoid a fresh wave after it reported an average of 80 infections each week.
All of Australia since the start of the pandemic has recorded 19,500 cases in total and 232 deaths which is much better than many other countries.
Melbourne makes up over half of the 19,500 infections.
On Sunday, Victoria declared a state of emergency and declared a night time curfew in Melbourne.
Western Australia, South Australia and the Northern Territory all shut their borders to the southern states last month to prevent cases coming in. Tasmania, an island state, has gone 14 days without a new case.