No it was Montreal Police on their channel 3. 16 is in Verdun & 20 is downtown. It was going on all night, it was not 1 operation. I also heard cars from station 12 (Westmont) being called with the D.
Montreal recently went to 6 teams. 3 on for 7 days & 3 off for 7 days. The shifts over lap to have extra vehicles on duty at certain times. I think it has something to do with that. What confuses me is that now at 20h00 they are using the "-" again.