What happened in the super east java derby between Arema vs  Persebaya Surabaya? with the match ending in a tragedy.

Arema Football Club is an Indonesian professional football club based in Malang, East Java. The club competes in the Liga 1, the top flight of Indonesian Football. They are considered one of the best and most successful football clubs in the country, and dons the nickname "Singo Edan".

 Persatuan Sepakbola Surabaya, commonly known as Persebaya Surabaya or simply Persebaya, is an Indonesian professional football club based in Surabaya, East Java. It currently plays in the Liga 1, the top flight of Indonesian football.