Surveillance video shows someone setting fire to the building in Ahuntsic-Cartierville, police said.
The Montreal police arson squad is investigating a fire in a motel in the Ahuntsic-Cartierville borough.
Someone called 911 around 7 a.m. to report the Metro Motel on Lajeunesse St. was in flames.
After firefighters extinguished the blaze, police looked at surveillance video, which they said showed someone setting fire to the building.
There was extensive damage to the motel, which was empty at the time, police said.