The curling world championship playoffs are on hold because of a positive COVID-19 test result inside the bubble set up for a series of events in Calgary, Alberta.
The World Curling Federation said Saturday's match between the United States and Switzerland has been postponed. The winner was to play Sweden in the semifinals. The Canadian curling federation said the asymptomatic positive test did not involve a competitor on any of the playoff teams.
Organizers said all competitors were to be tested on Saturday morning before play could resume. Scotland had already beaten Canada in the other qualification match, earning a semifinal matchup with the team from Russia.
All six playoff teams earned a spot for their countries in the 2022 Olympics in Beijing.
Last year's world championships were among the events canceled due to the coronavirus pandemic. This year's tournament was the last of six curling events planned for a controlled environment in Calgary.
The tournament was scheduled to end on Sunday.