Australia's Olympic committee says Australian athletes damaged beds in their Olympic village hotel rooms and put a hole in a wall before leaving.
Some athletes also showed "unacceptable behaviour" on their flight home.
But Australia team boss Ian Chesterman said no disciplinary action would be taken as the athletes had apologised.
He added that the damage was "minor" and that it was "not the hardest thing to break the cardboard bed".
Chesterman did not name the athletes or the sport they represented.
But the Australian Olympic Committee said the national governing bodies of football and rugby union were investigating reports of rowdy behaviour on a flight into Sydney last Friday.
Chesterman said: "Some young people made a mistake - they had left the rooms in a condition that was unacceptable."
Rugby Australia said it had launched its own investigation after being informed by Australian team officials of "unacceptable" behaviour by rugby and football players on the flight home from the Olympics.
Australia's men's rugby sevens team reached the quarter-finals at Tokyo 2020, losing to eventual winners Fiji.
[Source: BBC]
