Millions of Queensland residents on tenterhooks as they wait to learn whether lockdown will be extended after a mystery Covid case was detected overnight

Residents of Brisbane and the neighbouring Moreton Bay region are set to learn if lockdown orders will be extended again after a new local case emerged. 

Brisbane residents will learn at midday Saturday if a late mystery case of coronavirus discovered on Friday will keep them locked down. 

'The man in his 50s returned a positive result today, after becoming symptomatic on 30 June 2021 and undertaking a test on 1 July 2021,' Health Minister Yvette D'Ath posted on Twitter Friday afternoon. 

Residents of Brisbane and the neighbouring Moreton Bay region are set to learn if lockdown orders will be extended again after four new local cases emerged 

Brisbane residents will learn at midday Saturday if a late mystery case of coronavirus discovered on Friday will keep them locked down 

Queensland recorded four new cases of local transmission on Friday, all of them in the state's southeast corner.

Of particular concern are a mother and daughter from the Brisbane suburb of Carindale who visited many venues while infectious, and have not been linked to known clusters.

They are a primary reason Chief Health Officer Jeannette Young decided to keep Brisbane and the neighbouring Moreton Bay area in lockdown for an extra day, until at least 6pm on Saturday.

Premier Annastacia Palaszczuk has not ruled out a further extension, saying much will rest on Saturday's figures.

The other two cases of local transmission reported on Friday were a baggage handler at Brisbane International Airport presumed to have been infected by international crew, and a late breaking case involving a man on the Sunshine Coast.

The man in his 50s worked on the campus of the University of the Sunshine Coast and was there on Monday, June 28, and Tuesday, June 29, before Queensland's partial three-day lockdown began on Tuesday night.

Ms Palaszczuk says Brisbane and Moreton Bay will remain in lockdown for another day after the new cases emerged

But Dr Young has deemed him to be low risk because he had only minimal contact with others, and has not declared the campus a contact tracing site.

Authorities are yet to reveal what variant of the virus he has.

Late on Friday, Queensland Health released new contact-tracing locations at Brisbane Airport, Brisbane City, Griffin, Hatton Vale, North Lakes, Redcliffe, Sippy Downs, South Brisbane, Wellcamp, West End and Haigslea.

A full list of new locations is available at the Queensland Health website.

Queensland's snap lockdown ended for all regions except Brisbane and Moreton Bay at 6pm on Friday.

Masks remain mandatory outside the home in all areas that were subject to the initial lockdown, including all 11 local government areas in southeast Queensland, Townsville, Magnetic and Palm Islands.