In a statement here, CID gave their names as Ajay Kumar Sinha, Shrutikesh Kumar and Rajesh Kumar. Efforts were on to apprehend the other accused.
The Engineering, Agriculture and Medical Common Entrance Test (EAMCET-II) was conducted on July 9 by Jawaharlal Nehru Technological University, Hyderabad and the results were declared on July 14.
On July 25, CID had registered a case under relevant sections of IPC and other provisions of the Andhra Pradesh Public Examinations (Prevention of Malpractices and Unfair means) Act, 1997 (which also covers Telangana post-division).
They were made to practise with the leaked copies of two question papers comprising 320 questions with correct answers, the CID had said.
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According to the statement, Shrutikesh, a government veterinary doctor at Ghoshwari Village in Patna district, allegedly gathered seven students through his agents and sent them for a "preparation camp" at Dharmatalla of Kolkata (ahead of the test).
Sinha, a realtor, gathered seven students through his agent Rajesh Kumar and another four students through one Dharmender and sent them to the camp at Dharmatalla.