The Australian state of Victoria has declared a state of disaster and imposed new lockdown measures after a surge in coronavirus infections.
Under the new rules, which came into effect at 18:00 (08:00 GMT), residents of the state capital Melbourne are subject to a night-time curfew.
There will be further restrictions on residents' ability to leave home.
Australia has been more successful than many other countries in tackling Covid-19, but cases are rising in Victoria.
The state - Australia's second most populous state - now accounts for many of the country's new infections in recent weeks, prompting the return of lockdown restrictions in early July.
But on Sunday Premier Daniel Andrews said the measures were working but too slowly. "We must go harder. It's the only way we'll get to the other side of this," he told reporters.
The new rules will remain in place until at least 13 September, Mr Andrews added.