Investigators say a blaze in the east end that left two adults and two children homeless was sparked by a pot left on the stove.
Ottawa Fire spokesperson Marc Messier says a resident at 2440 Autumn Hill Cres. had been sterilizing baby bottles late Monday afternoon when they got called away to a family emergency.
They noticed the fire when they got home.
One person has been treated for minor smoke inhalation.
Damage is pegged at $100,000.