Tricia Jaffe, the head teacher, said the boy's attackers were not pupils at the school and it was not known who they were. A police spokesman said they would carry out searches and door-to-door inquiries today. Earlier yesterday, a teacher at King Edward VII school in Sheffield was threatened with a silver pistol when he asked three youths who were not pupils at the school to leave. The head teacher, Michael Lewis, said: "Like many schools, we have pleaded repeatedly with the council and the Government for resources to improve school security but up till now we have received kind words but no cash."
The incidents were the latest in a string of worrying attacks at schools, including the murder of the London headmaster Philip Lawrence last year.