A school student was allegedly sexually assaulted in a school bus in Shahdara's Anand Vihar area and police have booked the vehicle's driver, conductor and a school attendant, an official said on Wednesday.

The private school filed a complaint and the statement of the parents regarding the incident that happened when the girl was heading to her home in Indira Puram in Ghaziabad, the official said. "The parents however, did not come forward to give details of the incident and written complaint for further legal action," Delhi Police said in a statement.