South Australia to enter "circuit breaker" lockdown after coronavirus cluster grows

South Australia will begin a six-day lockdown from midnight on Wednesday night to prevent the further spread of a coronavirus cluster.

It's set to be the harshest lockdown implemented anywhere in Australia, with the closure of schools, universities, cafes, pubs, takeaway shops and restaurants.

The cluster originated at a hotel quarantine, with a worker spreading the virus to family members.

There have been 22 confirmed COVID-19 cases in the state after Australia had recorded over a week with no local cases.