New Delhi, July 22 -- A sophisticated credit card scam has rocked Kolkata and this time, the fraud didn't come from some shadowy cybercriminal overseas. It came from inside the bank.

Police have busted a racket led by Nafisa Ali, a former bank employee, who, along with a few accomplices, is suspected of siphoning off nearly Rs.1 crore from unsuspecting customers, reported TOI.

Their strategy? Brutally simple and disturbingly effective.

The group has been making phone calls to bank clients while posing as legitimate representatives for the last six months. They sounded completely credible because they had real client information, and the insider knowledge of bank processes to sound very genuine. Victims were convinced to provide credit ...