South Australia will reinstate strict statewide Covid restrictions from midnight tonight, Premier Steven Marshall announced this afternoon.

The level four restrictions are “not a lockdown”, said Police Commissioner Grant Stevens, but are intended to significantly reduce movement and public activity.

Hospitality will go back to a capacity of one person per four square metres and outdoor, seated consumption only.

Indoor fitness centres will close; all team and contact sport is cancelled; and personal care services and non-essential retail will close. Private gatherings, including weddings and funerals, will be capped at 10 people.

Masks will be required in high-risk settings, on public transport and in shared indoors spaces where you can’t physically distance.

There’s no direction to work from home, although it’s strongly encouraged.

Events with Covid management plans will also be cancelled. Illuminate Adelaide will pause its run of events (free and ticketed) this week.

“If we can ease these restrictions we will, but if we wait ... it can be too late,” Marshall said in a press conference.

The sweeping changes come after an 81-year-old man who returned from Argentina via New South Wales tested positive early Monday morning at Modbury Hospital. His daughter has since returned a positive test result. For a list of exposure sites visit SA Health.

The direction will be reviewed on Friday.

More to come.