Queensland has recorded a case of COVID-19 in the community, with the source of the infection so far a mystery.
The infected man is an aviation worker in his 30s, health authorities say.
A public health alert has been issued for locations in Eatons Hill, Aspley and Albany Creek in Brisbane's north and Rocklea in the city's south.
Seats 'R' Us in Rocklea was identified as a close contact site, while the Mother Duck Childcare and Kindergarten at Eatons Hill and Freedom Furniture Aspley were identified as casual contact sites last Thursday.
The man had not travelled interstate or overseas recently.
The last known case of community transmission in Brisbane was weeks ago and linked to a cluster at Sunnybank on the city's south side.
The latest case will be reported in Tuesday's COVID-19 data.
It had been 50 days since Queensland's last mystery case.
Queensland reported zero new cases on Monday, when Premier Annastasia Palaszczuk signalled revised modelling due this week would determine the state's path to reopening to people from New South Wales and Victoria.
Ms Palaszczuk has come under pressure to commit to a plan to reopen the state's borders.
Prime Minister Scott Morrison on the weekend said he could not see why Australians "should be kept from each other" if 80 per cent of the population was vaccinated.
Ms Palaszczuk said revised modelling from the Doherty Institute should be available by the end of the week.
When asked if the state borders would open by December, the Premier said a national plan would be discussed at National Cabinet on Friday.
"I look forward to those discussions with the Prime Minister and all of the other premiers," she said.
"We look forward to the day when all of Australia can open up and people can be reunited. But for that to happen, we need to make sure that people are vaccinated."
The NRL will be monitoring the situation closely, with the grand final due to be played at Brisbane's Lang Park on Sunday night.
