Patna: Bihar police on Thursday arrested three members of an inter-state cyber crime gang that had allegedly duped Bollywood star Shah Rukh Khan also five years ago.

Ajay Kumar Mandal, Bajrangi Mandal and Chhoti Mandal were picked up from Giridih in Jharkhand.

The superintendent of police of Aurangabad in Bihar, Satya Prakash, said the trio were part of the gang that had siphoned off Rs 75 lakh from Shah Rukh's bank accounts in 2013. The actor had come to Jharkhand by helicopter to speak to the investigators about the case.

The racketeers also fraudulently transferred an undisclosed sum of money from the accounts of the wife of a Haryana-cadre Indian Police Service officer. In Aurangabad district alone, at least 15 cases were pending and the gang's hand was suspected in them.

SP Prakash said since the arrested persons were wanted in Giridih, they were produced in a court there. "The Aurangabad police will take the trio on police remand for interrogation," he said.

Prakash explained the modus operandi of the gang.

"They call up people posing as bank officials on any pretext, say, linking the Aadhaar number to the account, and ask for ATM card details. Sometimes, they even warn prospective victims against giving the ATM PIN and say 'we are sending you an OTP (one-time password) from the bank and you have to confirm the OTP. Unfortunately, even educated people get convinced and duped," he said.

Every member of the gang makes 250 calls on average a day, said sub-inspector Rajesh Kumar, who was part of the investigation team. Another gang was assigned to arrange fake identity proofs to buy SIM cards from Calcutta.

Prakash said a special cyber unit was being set up at the district headquarters. Although cases would be registered at police stations, copies of the FIRs would be sent to the cyber crime unit to start investigations. Last week, DGP K.S. Dwivedi had said cyber crime and social media monitoring units would be set up in every district.