Ottawa Fire Services were on scene of a two-storey mixed occupancy building that housed a local restaurant.
Firefighters were called to 853 St. Laurent Blvd. in the Cummings neighbourhood near McArthur Avenue Friday evening after reports of heavy black smoke.
Firefighters declared a working fire upon arrival.
The location of the fire is at a local restaurant known as Coconut Lagoon.
According to a tweet from firefighter Scot Stilborn, the fire is running between the wall studs and floor joists. Ottawa Hydro has disconnected the power to the structure.
Crews remain on location fighting the fire.