Olympics-Wear a face mask, and no singing or chanting, say Tokyo organisers

Organisers of the Tokyo Olympics said on Wednesday athletes and officials should not use public transport without permission, and asked them to wear a face mask at "all times" during the event except when eating or sleeping.

The organizers unveiled a "playbook" detailing COVID-19 measures that will be taken during the Summer Games this year.

They also asked fans not to sing or chant to support athletes, according to their playbook.