The Noida Police has registered a case against the principal and two teachers of Ahlcon Public School in Mayur Vihar Phase-1 after a Class 9 girl committed suicide over alleged sexual harassment. The parents of the girl demand the Central Bureau of Investigation (CBI) to take over the case. The girl's family filed a complaint alleging she was "sexually harassed" by the two teachers, one of whom is a woman, the police said. She was found hanging at her home by her family members on Wednesday. They rushed her to the Kailash Hospital where she was declared dead.