Three further cases of COVID-19 have been recorded in Canberra as the Australian Capital Territory entered a snap seven-day lockdown.
9News can confirm the three new cases are all close contacts of the original positive case found in a man in his 20s today.
The man is the capital's first local case of COVID-19 in more than a year and is believed to have been infectious in the community.
The outbreak total now stands at four infections.
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It is the first time the ACT has entered a lockdown of this nature since the early days of the pandemic.
"This is the most significant risk that we have faced in the territory this year. Really, since the beginning of the pandemic," ACT Chief Minister Andrew Barr said.
Here are the rules for the next seven days in the ACT.
Can I leave my home?
From 5pm today, there will only be four reasons to leave home: essential employment, healthcare, to get groceries and for one hour of outdoor exercise per day.
People can only exercise with one other person, or with other members of their household.
Mr Barr has urged people to stay in their local areas for work, essential groceries, and exercise where it is possible.
He said leaving home for healthcare, including vaccination and essential workers, will be permitted travel.
"Where a service is available in your local area, please stay in your local area," Mr Barr said.
"This is not an opportunity to go to Bunnings to browse… get in, get what you need and get out."
Do I have to wear a mask?
Mr Barr said in "all settings, in all contexts" outside the home, people will need to wear a mask.
The only exemptions are if you are undertaking "rigorous exercise" or for a medical reason where applicable.
People in the ACT must have a mask on them when they leave the house.
Will the shops be open?
All non-essential businesses, including non-essential retail, will be closed for the week.
Anybody who can work from home, must work from home.
Hospitality venues can only operate in a takeaway capacity.
Can students attend school?
All public schools across the ACT will be closed for the duration of the lockdown, ACT Education Minister Yvette Berry has announced.
She said parents can send their children to school if they are essential workers or have no alternative.
For those who do go to school, if they are 13 and over they must wear a mask. The same applies for teachers.
Out-of-school care can also go ahead, but parents have been told: "If you can keep your children at home, keep them at home."
Childcares can also stay open, but the same principle of keeping kids home if possible applies.
Early childcare educators must also wear masks while at work.
Can I travel to the ACT?
All of NSW has been declared a COVID-19 affected area.
However, people in communities around the ACT border will be allowed to enter the Territory without an exemption, but only for essential work and healthcare reasons.
The postcodes covered by the exemption are 2581, 2582, 2584, 2611, 2618, 2619, 2620, 2621, 2623, and 2626.
"Make sure you have identification," Health Minister Rachel Stephen-Smith said.
"The decisions that we have made around the rest of New South Wales mean that ACT Policing will be very vigilant and looking out for New South Wales numberplates."
Why is the ACT locking down?
The ACT has recorded a mystery COVID-19 case.
The man who tested positive to COVID-19 in the ACT is in his 20s, and had been living in Gungahlin, ACT Chief Health Officer Kerryn Coleman said.
"Very late last night we were notified of some wastewater detections … and then this morning we received notification of our first COVID case in the community for many, many months now," Dr Coleman said.
At this stage, authorities do not know where or when the man contracted the virus.
The seven-day lockdown is acting as a circuit-breaker so contact tracers can look back at the last fortnight and work out where he has been, Dr Coleman said.
Dr Coleman said she suspects the strain of COVID-19 is the Delta variant and linked to the Sydney outbreak, but urgent genomic testing is underway.
Should I get tested?
Ms Stephen-Smith said testing people is key – within reason.
If you've not been identified as a contact, have not been at any of the venues of concerns, and have absolutely no symptoms – please don't crowd the testing centres, she said.
If you've been contacted by ACT Health or have any symptoms, get tested immediately.
How do I know if I've been exposed?
The man spent "extensive time in the community and we are considering him to have been infectious in the community from Sunday morning", Dr Coleman said.
There are a long list of close contact exposure sites being released by ACT Health.
You can find them here.
Dr Coleman said there are many close contacts of the positive case.
"I cannot give you exact number at the moment, but as you can imagine from the larger list of exposure site that I have listed, we're still working through how close contacts we have, so I can keep you up-to-date on how that is going," she said.
"I think this is one of the reasons why we are very concerned about this situation and why we have gone to implementing a lockdown."
Will Parliament be affected?
Mr Barr said he's "fairly certain" the territory's coronavirus case is "not Parliament House-related".
Mr Barr has spoken to Prime Minister Scott Morrison about the wider implications.
Parliament isn't due to sit next week, and the issues relating to lockdown will be worked through today.
