A 57-year-old man was arrested Friday morning in Lachine after bystanders intervened in a robbery attempt.
Montreal police say the man tried to steal money from a bar on Victoria street around 1 a.m.
They said when the suspect asked a waitress for the money, she alerted customers that she was being robbed.
Some of them approached the suspect. One person sustained minor injuries.
Police located the suspect shortly after while he was riding on a scooter.
He is expected to face robbery and assault charges.