The Class-II student was sexually assaulted inside the North Delhi Municipal Corporation-run primary school in Mongolpuri L Block and the incident came to light at around 9 AM today when her parents informed police about it.
The girl was taken to Sanjay Gandhi Hospital where a medical examination confirmed rape. The girl was later discharged from hospital.
"The victim was raped by a man inside the school campus yesterday. Her parents approached us this morning and a case has been registered. The victim could not tell us anything about the attacker.
Enraged over the incident, locals staged protests in the locality as well as near the hospital.
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As the protest turned violent, police used batons to disperse the crowd.
Some government-run buses and private vehicles were damaged in the incident.
Police have been deployed in large numbers to ensure no untoward situation in the locality.