I have experienced a similar situation involving the same Police force very near to Toronto airport - on a bus where apparently an individual (who was clearly mentally ill) had perhaps muttered something about a "device".
In that incident a single officer charged onto the bus in body armour - with no obvious Police markings - pointing his weapon at each of us in turn screaming "Which one? Which one?" to the bus driver.
Apparently it wasn't obvious that it might be the crazy looking old guy, talking loudly to himself, wearing a large handwritten sign with the words "Super Actor" on it - and carrying a huge sparkly tin-foil covered box with odd decorations.
So compared to that incident - the recent operation looks extremely well-planned and executed!