Health alerts have been issued for three suburbs in Queensland after people with infections visited a school, netball games and a coffee shop.
Venues in Corinda, Graceville and Yeronga were added to the list on Monday evening, taking the number of close contacts up past 100.
Queensland's Covid-19 outbreak has continued to spread with 13 cases of community transmission announced at the state's Monday morning Covid update.
Deputy Premier Steven Milles said Queensland's lockdown would be extended until 4pm next Sunday as a result of the new cases.
Brisbane's Ekka would also be cancelled for a second consecutive year.
Seven of the new cases are students from Ironside State School. Another five are related to the school being household members or family contacts.
One case is linked to a confirmed case from the karate school that trains at the school.
'For us to come out of this at the weekend, we need absolutely everyone in those LGAs to stay at home if they can,' Mr Miles said of the extended lockdown.
'It is absolutely critical that people only leave their homes for the four reasons. There's too many cars on the road in Brisbane at the moment. Too many people out and about.'
Queensland Deputy Premier Steven Miles provides the state's Covid update on Monday morning
People seen exercising in Brisbane on Monday morning as the state announced its lockdown would be extended until next Sunday, 4pm
Brisbane's famous Ekka agricultural show was cancelled for a second consecutive year on Monday. 'The risk is just too great,' Deputy Premier Steven Miles said
Cars are seen queuing at a Covid testing facility in Brisbane on Monday morning. Deputy Premier Steven Miles said 21,806 tests were conducted on Sunday but he hoped the number would double at the start of this week
Mr Miles confirmed home learning would be in place from Tuesday for the rest of the week for students of Queensland's state schools.
'Private schools will largely also have similar arrangements.'
He said he knew cancellation of Brisbane's agricultural show, the Ekka, would be 'disappointing'.
'I know that's sad and disappointing for many, many Queenslanders who love their annual ritual, their annual trip to the Ekka,' he said.
'We just can't afford to have an event like that where people travel into town and circulate in large numbers. The risk is just too great.'
Deputy Police Commissioner Steve Gollschewski confirmed 29 penalty infringement notices had been issued in the last 24 hours for non-compliance with public health directions.
'Eighteen of which were people who were out of lockdown when they had no valid reason,' he said.
'We had another two breaches of restrictions within homes, so unauthorised party type scenario.
'One person refusing to wear a mask when they didn't. A couple of border breaches. Three persons disobeying a direct direction from an emergency officer, so that's a police officer. And three breaches of public health directions.'
The Deputy Commissioner described the breaches as 'disappointing'.
