South Australia will be placed under COVID-19 restrictions as infections emerge across the country.
Premier Steven Marshall today said the new rules will be in place from midnight tonight for a week.
Masks must now be worn in high-risk settings such as aged care facilities and hospitals, and are recommended on public transport.
READ MORE: Woolworths forced to restrict toilet paper purchases after 'primordial urge' to panic buy
Mr Marshall said restrictions would be in place for a week.
Further rules include a cap of 150 people at private gatherings.
Any events involving groups of more than 50 must use QR codes and have a COVID-19 plan in place.
A one person per two-square-metre requirement is now in place for hospitality venues and only seated drinking will be allowed.
Buffets and the use of shishas are banned for the week.
Singing will also be prohibited and masks should be worn at entertainment venues.
Mr Marshall said Australia was at a "critical point" in its coronavirus situation.
"I think this has been a wake-up call for Australia, which has been doing extraordinarily well," he said.
Chief Public Health Officer Nicola Spurrier said she hoped restrictions would only be in place for a short time.
READ MORE: Nude sunbathers rescued from forest and fined after getting 'startled by deer'
Professor Spurrier said 29 miners in SA linked to the Northern Territory outbreak had all tested negative.
Professor Spurrier confirmed weddings and funerals would also be capped at 150 people.
She advised South Australians to carry a mask with them at all times.
Professor Spurrier said the restrictions were about protecting the state from outbreaks in surrounding states.
"We are in a global pandemic and things change and they change very quickly," she said.
No new COVID-19 cases were recorded in South Australia today.
READ MORE: Australia's COVID-19 crisis: State-by-state guide to border restrictions and lockdowns
Mr Marshall said the measures taken this week were to stop the possible spread of the virus in the state and implored people to get tested and vaccinated if they could.
"We have to be very vigilant at the moment, and we are pleading with the people of South Australia to immediately go and get themselves tested, even if they have the most minor of symptoms," he said.
"I think what's happening around Australia provides everybody with the motivation they need to go and get themselves vaccinated when they're eligible."
You can find out more details about how to book your vaccine through the Federal Government health site here.
