The Hayath Nagar police on Thursday registered a case against a school principal for allegedly thrashing a Class 3 boy. Naga Jayanth, a resident of Hayath Nagar was thrashed as he was teasing his classmates and bullying them. He suffered minor bruises on his thighs, said a police officer. The parents of the boy noticed the bruises in the evening and approached the police. The police registered a case. No arrest has been made yet. On June 20, a Class 7 boy was beaten up by the principal for not doing homework in Chandanagar. When the boy’s parents, confronted the school principal, he apologised and assured to pay the fees for the academic year.