Health officials in Australia's second-largest city said 317 new cases had been reported more than a week after a "hard boundary" around the city closed it off.
The chief health officer for Victoria state, where the city of Melbourne is located, announced 270 new cases Tuesday and warned of hundreds of hospitalizations in the coming weeks.
The premier of Victoria state, Australia's second-most populous, issues a six-week stay-at-home order for Melbourne and closes the border with New South Wales state, effective at midnight local time.
Victoria, whose capital city is Melbourne, has logged 127 cases in the last 24 hours, which accounts for more than 90% of Australia's infections during that period, according to national data.