TOKYO — Local officials are searching for a Ugandan athlete who went missing in western Japan on Friday in a case raising questions over Japanese organizers’ oversight of Olympic participants amid local coronavirus concerns.

The missing 20-year-old Julius Ssekitoleko was training as part of the nine-member Ugandan team in Izumisano, Osaka prefecture, city officials said.

Teammates realized the athlete was absent around noon Friday when his saliva test sample was not delivered and they found his hotel room empty, city officials said. There was no training Friday morning, and he was last seen in his room in the early hours of Friday.

After failing to find him inside the hotel, officials notified police for a broader search.

Media reports said Ssekitoleko, who did not meet Olympic standards in the latest international rankings, was to return home next week. Kyodo News agency said he left a note saying he wanted to stay in Japan and work.

The pandemic-delayed Olympics begin on July 23 despite mounting concern about Tokyo’s upsurge of infections. The host city on Friday reported 1,271 cases, after hitting a six-month high at 1,308 the day before.

The Ugandan team has featured before in Japan’s health and surveillance system.

On their arrival on June 19 at Narita International Airport, a member of the team tested positive and was quarantined there, while the remaining eight members were allowed to travel more than 300 miles on a chartered bus to Izumisano, their pre-Olympics camp in the western prefecture of Osaka.