All the three absconding culprits were arrested from Bohan Bhatti village of Hoshiarpur district in Punjab, he said at a press conference here.
Munish Chauhan, a tenth standard student, was abducted on April 17, while he was returning from his school and his body was recovered almost a week after his kidnapping.
Mr Jalal said a case under Section 302 of the India Penal Code (IPC) had been registered against them.
"The arrested people have confessed that they had committed their crime," he said.
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