According to reports, fake accounts have links with Trinamool leader Anubrata Mandal, who is currently in jail in connection with the cattle smuggling case, the CBI has alleged.
The central investigative agency further accused that the accounts were used to launder 10 crore worth of transactions.
The CBI sleuths have recovered several documents, pen drive and other incriminating articles pertaining to the case, the reports said.
CBI officials are currently quizzing the bank's manager and collecting documents, sources said.