Nürtingen (dpa / lsw) – A twelve-year-old broke through the roof window of a school in Nürtingen (Esslingen district) and was seriously injured. As the police announced on Friday, the boy had climbed the building with a friend when the children were out on the school grounds outside of school hours. How exactly they got on the roof was initially unclear. The boy fell several meters on Thursday evening and had to be flown to a hospital by a rescue helicopter.