MALANG, Indonesia (AP) — Panic and a chaotic run for exits after police fired tear gas at an Indonesian soccer match to drive away rampaging fans left at least 174 dead, most of whom were trampled upon or suffocated, making it one of the deadliest sports events in the world. 

Attention immediately focused on the police use of tear gas, which is banned at soccer stadiums by FIFA. The president of the world soccer body called the deaths at the stadium “a dark day for all involved in football and a tragedy beyond comprehension,” while President Joko Widodo ordered an investigation of security procedures. 

Violence broke out after the game ended Saturday evening with host Arema FC of East Java’s Malang city losing to Persebaya of Surabaya 3-2.

Disappointed with their team’s loss, thousands of supporters of Arema, known as “Aremania,” reacted by throwing bottles and other objects at players and soccer officials. Witnesses said fans flooded the Kanjuruhan Stadium pitch and demanded that Arema management explain why, after 23 years of undefeated home matches against rival Persebaya, this one ended in a loss.

The violence spread outside the stadium where at least five police vehicles were toppled and set ablaze. Riot police responded by firing tear gas, including toward the stadium’s stands, causing panic among the crowd.