A U.S. female gymnast has a positive test for COVID , during her pre-training camp at a city northwest of Tokyo, the major venue for most of the Olympic sports and games. Her results were announced on Inzai city’s website. The news was first reported by Kyodo News Agency, Japan. No name was provided. Other athletes have also tested positive, and this has become a matter of concern before the Opening Ceremony of the Olympics on Friday. She is the first American to test positive

According to the website, the team arrived in Japan on Thursday. They stayed in their travel accommodations and practiced in the scheduled venues in Inzai, a city that is 35 miles east of Tokyo. They did not visit the city.

A statement from USA Gymnastics also declined to identify the gymnast by name but said that an alternate had tested positive on Sunday and she and another alternate member of team USA were under quarantine. They also said that the team was continuing to prepare for the games.

In a statement to NPR USA Gymnastics said that the Olympic athletes moved to separate lodging accommodations and a separate training facility on Monday. They will prepare for the women’s qualifying events that are scheduled to be held on Sunday, July 25. The women’s final event will be held on July 27 and the all-round individual final is scheduled on July 29.

Simon Biles, the defending world champion in gymnastics, has been vaccinated and so has the regular team.

As thousands of athletes, journalists and others reach Japan for the Olympics, positive cases have also been identified among them from different countries. Despite strict guidelines, testing, and following protocols. Those who tested positive before leaving their countries were replaced by alternates including U.S. Tennis Star Coco Gauff. Yet, some have tested positive after reaching Japan. On Sunday, Olympic organizers said that four athletes have already tested positive for COVID-19 in Japan.