PORT ELGINA Port Elgin apartment fire which killed two cats and displaced about 15 tenants early Sunday morning was fuelled by a pizza box in an oven, the fire chief said Wednesday.“It was determined the fire was the result of cooking in the kitchen,” Fire Chief Phil Eagleson said Wednesday. There was a pizza and box in the oven but he said firefighters couldn’t determine exactly was what the first ignition source.“We do know it wasn’t left unattended. It wasn’t suspicious in nature.”Thirty firefighters from both fire halls in Saugeen Shores responded to a 12:20 a.m. 911 call to the apartment on Waterloo Street. The fire started in a unit on the main floor. There are about a dozen units in the two-storey brick building.All residents were relocated to the All Seasons Motel in Port Elgin, which Eagleson praised for its efforts to accommodate them. Some have returned to their apartments, while others will have to wait longer for clean-up and repairs.The fire caused an estimated $150,000 damage in the apartment building, both to the apartment unit and contents where the fire started and to others. There was smoke and water damage too, Eagleson said.Eagleson said there were working smoke alarms in the apartment and that the residents got out on their own. All residents were evacuated from the building.There were two other apartment fires in Saugeen Shores in the past month. The cause of those fires remains under investigation but it wasn’t cooking, he said.A week ago, firefighters contained a fire to one unit in an apartment building. Eagleson said early and updated alarm systems helped firefighters put out the fire quickly.A couple weeks before that another apartment fire on Waterloo Street killed a cat and dog. Damage in that blaze was estimated at $100,000.Eagleson said some buildings’ fire alarm systems are monitored and those buildings automatically notify the fire department. Residents need to know which system they have in their building, he said. None were monitored in the recent fires, he said.“If they’re not monitored, and in that case they need to go to their hallway in their apartment and pull a pull station to active an alarm that sends a message.”But those alarms only provide firefighters with the location of the call. People should continue to call 911 so that more details can be supplied to the fire department, Eagleson said.