That sucks. I would hate if that happened here, because you never know what might happen to you or other people around. Also was your friend involved into the gang's activity?
Also in Montreal there was a terrorist attack in a metro station, which caused the entire metro service to be shut down during rush hour yesterday. IIRC 3 women and 1 man were involved and they were part of the small gang that starts riots in most protests, such as the student ones lately. (They're not actual students, but they join those huge crowds to start trouble and break stuff then those who only participate in the march or protest peacefully get the blame.)
At times Montreal kinda reminds me of October '70 nowadays