The incident allegedly took place yesterday when the teacher called the girl into a room inside the school campus, Circle Officer Vir Pal Singh said.
The girl told her parents about the incident after reaching home, Singh said.
On a complaint from the girl's mother, the police have registered a case against the teacher, Harbinder Singh, under IPC sections dealing with outraging a woman's modesty and attempt to rape along with the Protection of Children from Sexual Offences (POCSO) Act.
The girl's parents, along with others, staged a protest outside the school this morning, demanding the arrest of the teacher, he said.
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