A Singapore League game ended before it even started when players from S-League champion Etoile FC and Houngang United engaged in an all-out brawl before the kickoff.

The brawl was sparked by a minor altercation while the teams warmed up at Hougang's stadium and quickly escalated -- sending four people to the hospital for minor injuries.

“We have a zero tolerance policy when it comes to violent conduct both on and off the field,” Singapore federation (FAS) President Zainudin Nordin said. “FAS has started investigations and will pursue the matter thoroughly. Any players and officials found guilty of misconduct will be severely dealt with.”

Games for teams have been suspended and a June 3 A disciplinary hearing has been scheduled.