Led by NCW member Shamina Shafiq, chairperson of the enquiry committee in the nun gangrape case, a three-member team talked to the convent authorities for over an hour.
"We are concerned as there is no arrest. There is footage available, so they should have been arrested. We will talk to the police," Shafiq said.
Asked if it was the fault of the state administration, she said, "Definitely it is the fault of the state."
No arrest have been made in connection with the March 14 incident though 17 persons have been detained. CCTVs installed in the school captured photos of the accused.
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The nun, who was the Sister Superior of the convent school, was discharged from hospital in the wee hours yesterday and she left for an undisclosed destination.
The state government had initially ordered a CID probe but decided to hand over the case to CBI as the accused persons were suspected to have fled to Bangladesh.
But the premier investigation agency is yet to formally take charge of the case.