The brawl started around 7:30 PM. One of those involved fled away along the track. Several others pursued him. Electricity supplies were cut off out of security concerns halting metro services.
It took nearly an hour and a half before services could be resumed.
The MIVB's Guy Sablon acknowledges that the interruption lasted for quite a while but insisted that as long as there was any suspicion people could still be on the track electricity could not be switched on again: "A considerable part of the metro network could not be serviced, but we had no other choice."