J. League first-division club Sagan Tosu suspended all activities in the wake of a cluster infection within the team Wednesday, forcing the last-minute postponement of one game and throwing several more into doubt.

The club, based in Kyushu’s Saga Prefecture, tested 89 players and team officials Tuesday after manager Kim Myung-hwi was found to be infected with the new coronavirus Monday afternoon.

Six players and three staff members showed strong indications of infection in their initial tests. A player and staffer who reported fevers Tuesday returned positive antigen tests earlier in the day Wednesday, while the rest were given additional PCR tests that came back positive later in the afternoon.