It was the closing stages of the match, a soccer derby in Indonesia¡¯s East Java province, and 29-year-old spectator Ahmad Nizar Habibi said he had a gut feeling things were about to turn ugly.

¡°I wanted to leave, but suddenly I heard explosions,¡± he said, describing rounds of tear gas fired as Saturday¡¯s nighttime match ended and fans invaded the field, angered by the home team¡¯s loss.

¡°We couldn¡¯t see. Fans were screaming and we couldn¡¯t breathe,¡± said Habibi.