Dheeraj Khanna, Pankaj Deewan, Yogesh Mahajan and Mohammad Yasin were arrested Tuesday from Delhi. Three of their accomplices are untraced and on the run, police said.
The arrests of the four men led to the recovery of 13 Electronic Data Capture (EDC) machines, a skimmer, some debit and credit cards in various names and some forged documents.
The arrests came after Samarjit Singh Sahi, manager of the risk control unit of HDFC Bank in west Delhi's Rajouri Garden, lodged a complaint with police.
"Dheeraj Khanna opened an account in HDFC Bank as Rohit Kumar, claiming to be the owner of a jewellery shop. He requested for four EDC machines, which the bank provided," said Sanjeev Kumar Yadav, Deputy Commissioner of Police (Special Cell).
Bank officials visited Khanna's address to verify their suspicions over transaction patterns made by the accused after he used the EDC terminals for swiping international and domestic cards amounting to Rs.9.75 lakh.
Khanna was not found at the address.
"After getting EDC machines, Dheeraj cloned credit cards with Pankaj Deewan, Yogesh Mahajan and Yasin," said the officer.
Dheeraj got 40 percent of the total amount swiped.
Dheeraj destroyed the EDC machines and cheque books when the bank tried to contact him for the suspicious transactions.
"Interrogation revealed that domestic cards were cloned by Kamal and international cards were cloned by Devender Chauhan of Uttar Pradesh's Agra with the help of a professional hacker," said the officer.
Data of genuine customers was stolen through the skimmer, used to copy data of a credit or debit card, and then copied on a plain card.
"Kamal, Rahul and Devender Chauhan are still at large and cloned cards are still to be recovered. A hunt is on to nab the absconding accused," the officer added.