The tragedy happened Saturday afternoon at Labouheyre, in the Landes.
At around 16.45, a fire erupted in a house where there were 3 adults and 5 children.
A girl, aged 3 years, died in the fire. A teenager of 17 years and a fifty-year-old seriously injured, were helicopter to the hospital Pellegrin in Bordeaux.
According to the first elements of the investigation, the fire started on the first floor of the dwelling, where stood the fifty-year-old and the girl is 3 years old.
The adult would have then jumped through the window, and the young 17 year old girl reportedly tried in vain to recover the child,k before being seriously injured by the flames.
Two other people were more lightly injured.
The investigation was assigned to the brigade of research of the company of gendarmerie of Parentis.