The state of South Australia has announced a six-day “circuit-breaker” lockdown for its nearly two million people to contain a sudden coronavirus cluster in its capital city that ended a months-long streak of no infections.

Schools, restaurants and factories were told to close at midnight while stay-at-home orders were issued for residents across the state.

According to AFP, it came as two new cases were linked to a cluster that emerged from an Adelaide hotel used to quarantine travellers from overseas, taking the outbreak to 22 cases.

Weddings and funerals will be banned and mask-wearing in public made mandatory in the state, which had not recorded a significant outbreak since April.