Kolkata: A former bank manager lost Rs 4.5 lakh to cyber fraudsters in a credit card scam, leading to the arrest of an app-based bike rider in south Kolkata. It has been revealed that he had rented out his account to fraudsters for easy money. The cops have also detained a private bank's manager and questioning him on allegation that he helped the bike taxi rider to commit the crime.The Cossipore police arrested the accused, identified as Ashish Sahu, from Bansdroni for allegedly allowing his bank account to be used for transferring fraudulently obtained money.A private bank manager is also being questioned for suspected involvement in the crime.According to police sources, the victim, whose identity remains undisclosed, was contacted through social media by someone posing as a bank employee offering assistance with a credit card application. Despite his previous experience in handlingbank fraud cases, the retired manager shared his bank account details and ATM card information with the fraudster."Multiple unauthorized transactions totalling Rs 4.5 lakh were made from the victim's account," said inspector Rajesh Kumar of Cossipore police station. During interrogation, Sahu confessed to renting out his bank account to fraudsters for a commission, finding it more lucrative than his regular income from bike-riding services.The investigation revealed connections to the notorious Jamtara gang, with accomplices operating from Kolkata. "While the primary perpetrators are from Jamtara, they have established a network in; Kolkata," Kumar added.