A 16-year-old was sent to a Hamilton, Ont., hospital with critical injuries after a house fire in Thorold on Saturday morning, according to Niagara police.
Investigators say the teen was discovered inside a residence near Maitland and Colborne streets when the fire broke out sometime before 11 a.m.
A 70-year-old female was transported to a local hospital for minor injuries.
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Niagara police and the Ontario Fire Marshall are investigating the incident.