Though police confirmed that one person has been taken in custody, they did not reveal his identity and other details.
Deputy Commissioner of Police Sanjay Darade told PTI that police had been interrogating some persons in connection with the case and the person detained was one of them.
"We will come back to you by evening," the DCP added.
A Class V student of a local school at Lakadganj in eastern part of city area was allegedly criminally assaulted on Tuesday by an unknown accused.
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The profusely bleeding girl was rushed to state run Mayo General Hospital and has been admitted there since then.
Yesterday, the locals observed a bandh in Shanti Nagar area to protest the offence and demanded immediate arrest of the culprit.
Shiv Sena spokesperson Neelam Gorhe also met the Commissioner of Police yesterday and demanded strict action against the culprit.