South Australia will enter a snap seven-day lockdown from 6pm this evening, as the state’s Covid-19 cluster continues to grow.

Premier Steven Marshall made the announcement at a press conference this morning.

The move to Level 5 restrictions comes after a fifth person was linked to the growing cluster – a diner at the Greek on Halifax.

The lockdown is statewide and involves schools and the construction industry. Read more in our blog below.

The cluster began when an 81-year-old man and his daughter tested positive to Covid-19 on Monday – with authorities treating it as the highly infectious Delta strain.

A third and fourth case were revealed late Monday and early Tuesday. The third case is a man in his 50s who is a close contact of the 81-year-old man and is also a staffer at Tea Tree Gully Council – which has closed its facilities on Tuesday.

The fourth case is a man who was another close contact of the 81-year-old man and was already in quarantine.