MUMBAI: The cyber police on Saturday arrested a man for stealing over Rs 3.3 crore from a businessman's bank account using a fraudulently-obtained SIM card through which he received OTPs for transactions.The businessman, a publisher of school books, approached the police on July 12 after realizing that he had been cheated during July 7-9. The cyber cell used the digital trail of the transactions to zero in on the accused, Amanatullah Shaikh (33), a Govandi resident.The accused, who works as a small-time construction contractor, had knowledge of the businessman's particulars, including his mobile phone number. He approached the mobile service provider at one of its galleries, pretending to be the businessman and requested that his (the businessman's) number be blocked as "he had lost his phone". Shaikh then produced duplicate documents proving the businessman's identity and got a new SIM card. "He put the SIM in his phone and began transacting from the businessman's bank account, using OTPs sent through the new SIM card to validate the transactions," said an officer.The police are probing how Shaikh obtained the businessman's identity documents, including his Aadhaar card. They refused to say how Shaikh got the businessman's netbanking details, including account number and password.An officer said that the crime had all the signs of a syndicate operation. "Several persons are suspected to be involved. It's not easy for anyone to get someone else's bank account details and also identity cards. Shaikh's arrest is just the beginning of our probe," he said.The police have asked the mobile service provider for CCTV footage from the gallery concerned and other details.Shaikh is married and lives in Baiganwada, Govandi. "We are trying to find out where he duplicated the documents," said a source.Of the Rs 3.3 crore stolen, at least Rs 25 lakh was transferred to Shaikh's own account. "He used around Rs 1.5 lakh to buy gold and around Rs 4 lakh for other things. We have written to the bank to freeze his account," said DCP Vishal Thakur (cyber police).