Investigators said the fire started in a cooking pot with oil inside of it.
A resident of the apartment had stepped out of the kitchen for a minute and the smoke detector activated to alert the other family members, fire officials said.
A family member woke up and found the oil had boiled over and ignited. She attempted to apply water to the fire and the fire spread, according to firefighters.
Three family members were relocated with the help of the American Red Cross.
Two firefighters suffered minor injuries and were treated at the scene, authorities said.
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