Police told Global News an investigation into the three incidents — and any link between them — is ongoing.

Firefighters were called to a burning building shortly before 10:30 p.m. Wednesday in Ahuntsic-Cartierville. The fire started in the back of a butcher shop and spread to the roof located at 44 Henri-Bourassa Boulevard West.

The Société de Transport de Montréal put the first ever AZUR train officially into service Sunday morning.