A fact-finding team tasked with investigating a deadly soccer stampede in Indonesia has concluded tear gas was the main cause of death in one of the world's worst stadium disasters.

The team, which included government officials, soccer and security experts, has been investigating how more than 130 people died in a crush after a match at Kanjuruhan stadium in East Java on October 1.

Co-ordinating Security Minister Mahfud MD said a separate team was still investigating the toxicity of the gas used, but whatever the result it could not "diminish the conclusion that the massive (number of) deaths was mainly caused by tear gas".

Indonesian authorities and the nation's football association (PSSI) have faced mounting questions and criticism over why police fired tear gas inside the stadium, a crowd control measure banned by world soccer's governing body FIFA.

The fact-finding team found the police personnel on duty had no knowledge of the prohibition of tear gas at soccer matches.

Gas had been fired "indiscriminately" and the officers had employed "excessive" measures, their report said.

The police have sought to play down their role in the tragedy, emphasising that narrow doors in the over-capacity stadium, exacerbated the crush.

The police and military are investigating dozens of their officers in relation to the incident.

The investigators concluded the PSSI had been negligent by ignoring regulations and called for the resignation of its chairman and executive committee. It added that match organiser PT Liga Indonesia Baru had also been negligent.

Mahfud said the findings, detailed in a 124-page list of recommendations, had been handed to the president.

Earlier this week the PSSI announced it had formed a joint taskforce with FIFA in a bid to improve crowd control and safety measures.

The rare intervention by the sport's governing body comes with Indonesia due to host the FIFA under-20 World Cup next year.

Source: https://thewest.com.au/sport/soccer/java-soccer-stampede-caused-by-tear-gas-c-854914