Officials are searching the wreck of a heavily damaged building in Trois-Rivières to ensure nobody is trapped inside.
Fire department spokesman Dany Cloutier says there are unconfirmed reports that a person might have been inside the commercial building when the roof caved in just after 1 p.m. today.
Cloutier says a canine search-and-rescue team has been called in to help search for any possible victims.
A team of five technical specialists from the Montreal Fire Department is also en route to verify the site is safe before anyone ventures further under the wreckage.
There's a good chance that the operation will continue into the early hours of Sunday morning.
The incident occurred less than 24 hours after the roof of a grocery store partially collapsed in the Quebec City suburb of Lévis.
Two people suffered minor injuries in that incident, which is still under investigation.
With files from CTV Montreal and the Canadian Press.