"If the fans had followed the rules, this incident would not have happened," he said.
Security personnel are banned from using crowd-control gas and firearms at stadiums under FIFA stadium safety and security regulations.
"The Indonesia Football Association may have been negligent for not informing the police that security procedures at a soccer match is not the same as those at a demonstration," he added.
Witnesses said fans were not attacking rival supporters. Rather, they were demonstrating their disappointment at the players and officials as they left the pitch.
