Four people were taken to hospital following an early morning fire at a multi-unit residential building in Barrie on Sunday.
Barrie Fire and Emergency Services responded to the incident shortly before 8:40 a.m., deploying five fire trucks and a platoon chief to the scene.
The affected property housed vulnerable residents, who have since been temporarily relocated while arrangements are made for their accommodation.
Barrie Police are maintaining control of the scene as investigators work to determine the cause of the fire.