Gatineau Police have taken over the investigation into a massive fire Thursday on Cite-des-Jeunes Boulevard.
Sgt. Jean-Paul Lemay says they've received information indicating the blaze could have criminal origins.
Investigators are on scene and will be speaking with a number of witnesses.
One person is in custody, but charges have not been laid.
More than 100 people were forced out of their homes because of the fire, which was so large crews from Ottawa were called in to help.
Gatineau Fire says it appears the fire was sparked on a stove top.