Seven members of Japan's team at the World Athletics Championships, including two marathon runners, have tested positive for Covid-19, organisers said Saturday. A joint statement from World Athletics, the Japan Association of Athletics Federations and local organisers said the outbreak had hit endurance athletes and staff at the championships in Oregon. Two marathon runners, four support staff and the head coach of the team had returned positive tests. The identities of the individuals involved were not disclosed. The statement said the seven individuals had already been isolated and will remain in isolation for five days.