At least one person is killed and another one is injured after the roof of a house collapsed Saturday, 3rd of March, in Derb Chorfa, a neighborhood in Mers Sultan, Casablanca, said Le 360. The victim is a 17-year-old girl whose twin sister was woonded also in the same incident. The latter was transfored to the hospital to get the necessary assistance. Firefighters arrived on scene and helped pull the two girls. Local authorities have opened an investigation to determine the circumstances of this collapse.