Kanjuruhan Stadium disaster
The disaster happened after a match between Arema F.C. and Persebaya Surabaya. At first, the match went well. Arema lost to Persebaya with a score of 2–3. Arema's supporters (called Aremania) invaded the pitch and rioted after their team lost. Around 3,000 supporters invaded the pitch.  The police had to use tear gas to stop the riot. This made people panic. Many tried to leave from a single exit. Because of this, people got crushed in the stampede.