Police patrolling the area of a suspicious vehicle fire on S. May Street were quick to extinguish a second fire that popped up in the area.

Fire Rescue units were already putting out a fire when one of the firefighters noticed a fire at the back of an apartment building, Thunder Bay Fire Rescue stated in a press release this morning.

One police officer grabbed a fire extinguisher while a second officer filled a nearby garbage can with water and doused the rest of the fire.

Firefighters opened up the exterior wall of the structure to ensure the fire had not travelled deeper into the wall.

Officials say the fire was contained to the building's exterior, and caused limited damage. 

All occupants of the building were allowed to return to their apartments.

Police have been investigating a series of fires on the south side, including two on South Archibald Street.

The fires all burned garages, sheds and in one case, a child's playhouse.

Thunder Bay Police are investigating this fire.