Tasmania is mandating masks indoors as the state records three new COVID-19 infections after reopening its border.
It takes the number of active cases in Tasmania to seven.
One of Sunday's new cases was a woman who arrived in Launceston from Sydney on Wednesday and visited a number of retail venues.
Another was a man who arrived in Hobart from Melbourne on Friday and the third was a family member of a previously confirmed case.
"What we're seeing occur at the moment is not unexpected. We said that we would see COVID in the state," Premier Peter Gutwein told reporters.
Masks will be mandatory across all indoor settings, public transport and ride shares from 12.01am on Tuesday.
"We've done this before. It's important. In fact, a lot of Tasmanians are already doing it," Mr Gutwein said.
Slightly more than 91 per cent of Tasmanians aged 16 and older are fully vaccinated.
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