Early on the morning of May 23, a gang of Christian militia members, led by transmigrant Fabianus Tibo, killed a policeman and two civilians in central Poso town and took refuge in a Catholic church.
Pada pagi hari tanggal 23 Mei 2000, sekelompok anggota milisi Kristen, dipimpin oleh transmigran Fabianus Tibo, menewaskan seorang polisi dan dua warga sipil di pusat kota Poso dan berlindung di gereja Katolik Santa Theresia Poso.