"The incident is inhuman and shameful. It is a shocking incident. The municipal corporation must strengthen their existing security infrastructure in the schools," she said.
The Class-II student was sexually assaulted inside the North Delhi Municipal Corporation-run primary school in Mongolpuri L Block allegedly by an unidentified man. The incident came to light at around 9 AM today when her parents informed police about it.
Expressing her deep anguish over the incident, Dikshit said the city government has directed the civic body to "urgently" take stock of security situation in its primary schools in order to ensure a sense of confidence among the parents.
Dikshit has directed Chief Secretary D M Spolia to contact the authorities concerned in the NDMC.
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"Prima facie it appears that lack of security and supervision by NDMC might be the cause of the incident," said an official at Chief Minister's office.
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," a senior police official said.