The cause of a fire which badly damaged a Sheffield school is under investigation.
Three fire engines were called to the scene
Three fire engines were called to the incident at City School on Stradbroke Road, Richmond, at 2139 GMT on Saturday.
The fire is believed to have started on the first floor of the building, gutting the head teacher's office and spreading to other parts of the building.
Around 15 firefighters took two hours to bring the situation under control.
Now investigations are under way to establish the cause of the fire.
Officers are considering the possibility of a firework prank being responsible for the damage.