The so-called bubble to control COVID-19 infections at the Olympic athlete's village in Tokyo is already "broken" and poses a risk of spreading infections to the general populace, a prominent public health expert warned on Tuesday.

In the latest revelation of infections spreading among athletes and staff, Olympics organizers said Tuesday a foreign athlete at the village and eight other people related to the Games had newly tested positive for the coronavirus.

The tally also included an Olympic volunteer for the first time since the committee started compiling figures on July 1, bringing the total number of Games-related infections to 67.