12-year-old girl dies from Oshawa house fire injuries

A 12-year-old girl died on Monday after suffering injuries from a house fire in Oshawa that killed her mother and younger sister last week. The fire occurred on McGrigor Street, where crews found heavy smoke and flames. The girl's mother, 46, and her nine-year-old sister were pronounced dead at the scene. A 56-year-old father and another child were hospitalized with serious injuries. The father's condition has improved. Investigators from the Office of the Fire Marshal are looking into the cause of the fire. Police reported no signs of foul play and do not believe it was arson.