Queensland's snap lockdown will be extended for Brisbane and Moreton Bay after the state recorded three new locally acquired cases of COVID-19.
One of today's cases is the partner of yesterday's airport case - a 37-year-old woman who worked at the Qatar check-in counter at Brisbane's international airport.
The woman has tested positive to the highly infectious Delta virus strain.
LIVE UPDATES: National Cabinet eyes slashing overseas arrivals
Dr Young said that the transmission is not linked to any other Queensland clusters.
"It is not clustering with any known case in Queensland or Australia and on the international data base, it looks like it is closest to some cases in India but we just need to confirm that," she said.
"The gentleman, who is now the new case, acquired it probably from international airline crew. He is a luggage handler at the airport."
The other two cases are a mother and daughter from Carindale, in Brisbane's east, who tested positive this morning.
"They have been out quite extensively around Brisbane," Premier Annastacia Palaszczuk said.
"We really need our contact tracers - and this is the advice of Dr Young - to really get on top of this issue quickly today," she said, adding they are the reason the lockdown has been extended for these areas.
Ms Palaszczuk said there were 6993 tests conducted in the last 24 hours, as well as 17,436 vaccines administered.
The state now has one positive case in ICU.
Changes to lockdown
Queensland's three-day lockdown will end for some LGA's including Noosa, Sunshine Coast, Ipswich, Logan, Redlands, Gold Coast, Scenic Rim, Lockyer Valley, Somerset and Townsville.
Mask restrictions will remain in place for the next two weeks.
"That means everyone will have to carry a mask on them and wear that mask whenever they're outside of their home but of course not when you're driving your vehicle," Ms Palaszczuk said.
"That means going to shopping centres, hospitals, aged-care facilities, churches, everywhere else. This is our added protection."
The lockdown will continue for Brisbane City Council and Moreton Bay local government areas for 24 hours to allow contact tracers to identify any further spread of the virus.
READ MORE: Potential isolation breach could extend Darwin's lockdown
Calls for international traveller caps
Ms Palaszczuk has reiterated her calls for tighter caps on international arrivals.
The issue will be at the forefront of today's National Cabinet meeting.
"Our hotels are stretched. We are basically at capacity," Ms Palaszczuk said.
"We need an immediate reduction by 50 per cent. I will be raising that this morning at National Cabinet."
The state currently has 3097 people in hotel quarantine across 15 hotels.
A total of 2459 of those are international passengers.
"The message I have got to people arriving and involved in that, please exercise patience," Queensland's Deputy Police Commissioner Peter Martin said.
"Our officers and the health workers are doing everything they can to manage this and they will be there to help you."
