A group of athletes has sparked a COVID-19 scare in the Australian Olympic team after mingling with other residents inside the Games village.
The incident was revealed as a group of about 150 team members, include many gold medallists, prepare for a Monday night charter flight back home and then two weeks of quarantine.
Team chef de mission Ian Chesterman said none of the Australians involved in the Saturday night incident had tested positive and they had rejoined the group.
"It was a very minor offence - I'm not taking any disciplinary action, none was necessary," he said.
It followed a party in a park on Friday at the end of the Games village, which did not involved any Australian team members.
"There was a similar mingling afterwards (on Saturday), we became aware of that and that a few of our athletes had been mixing with other athletes - not in the heat of the party, but in places outside of our direct allotment," Chesterman said.
"That's clearly something we don't encourage.
"They understood what they did was not according to the Australian playbook, but nonetheless it didn't lead me to any great concern."
Chesterman would not name the athletes or their sports.
He said they had finished their competition at the Olympics and the incident involved "around about" 10 members of the Australian Games team.
Olympic athletes are having to abide by strict COVID-19 protocols and there are no crowds at Tokyo competition venues.
The group flying back to Australia on Monday night includes members of the record-breaking swim team and BMX freestyle gold medallist Logan Martin.
Many of them will do their quarantine at the Northern Territory's Howard Springs facility.
Martin already has experience with quarantine, after winning his second world title two months ago in France.
"I don't think I can get a worse room than I did ... I had a little shoe box with a window that didn't open," he said.
"So going into Howard Springs, it looks a lot more comfortable and I get some fresh air.
"Obviously, it's a lot easier going into hotel quarantine with a gold medal to look at every day as well."
Swimming gold medallist Ariarne Titmus thinks quarantine will be a "blessing in disguise", giving them time to relax and reflect before heading home.
"For the first few days I will definitely be sleeping and watching the Olympics," she said.
"But then I have other things to keep me occupied - some colouring in, nail polish and that type of thing."
Team co-captain Cate Campbell has downloaded Chris Hemsworth's fitness app to help pass the time.
Swimming head coach Rohan Taylor said daily routine is critical for quarantine and they will organised some virtual team activities.
Chesterman said it was too early to say what official welcome home would be organised for the Australian Olympic team, given the rapidly changing situation with state lockdowns.
Australian Associated Press