Explainer: What's behind Indonesia's deadly soccer match

Here's a look at how the chaos occurred and what is being done to prevent future incidents.HOW DID THE CHAOS OCCUR?Chaos broke out after Persebaya Surabaya defeated rival Arema Malang 3-2 in Saturday night’s match in East Java’s province Malang city. Police said there were some 42,000 spectators in the stadium, all of whom were Arema’s supporters because the organizer had banned Persebaya fans in an effort to avoid brawls.

1/9In pics: Over 150 people killed after stampede at football matchShow Captions<p>Over 150 people were killed and around 180 injured at a soccer match in Indonesia after a crowd stampede during a riot, police said, in what appears to be one of the world's worst stadium disasters.

(AP Photo)</p>A damaged car is pictured following a riot after the league BRI Liga 1 football match between Arema vs Persebaya at Kanjuruhan Stadium, Malang, East Java province, Indonesia. (Reuters)Soccer fans carry an injured man following clashes during a soccer match at Kanjuruhan Stadium. (AP Photo)Police officers and soldiers stand amid tear gas smoke after clashes between fans during a soccer match at Kanjuruhan Stadium in Malang, East Java, Indonesia, Saturday, Oct.

1, 2022. Panic following police actions left over 100 dead, mostly trampled to death, police said Sunday. (AP photo)Security officers detain a fan during a clash between supporters of two Indonesian soccer teams at Kanjuruhan Stadium in Malang, East Java, Indonesia.

(AP)Soccer fans enter the pitch during a clash between supporters at Kanjuruhan Stadium in Malang. (AP photo)Plain-clothed officers stand near the wreckage of police vehicles damaged during a clash between supporters of two Indonesian soccer teams at Kanjuruhan Stadium in Malang. (AP.