Days after a sting operation purportedly show bank officials helping launder money, HDFC Bank today said it has hired independent audit firm for conducting forensic inquiry while Axis Bank initiated a probe into the matter.    

"The bank has appointed accounting and audit firm Deloitte Touche Tohmatsu India to carry out an independent forensic enquiry into the allegations and reported statements, as made by Cobrapost representatives, when secretly taping bank officials," HDFC Bank said in a statement.         

Besides, the bank has also appointed Amarchand & Mangaldas & Suresh A Shroff & Co to examine the breaches, if any, of the bank's Code of Conduct & Ethical Standards, by any bank officials, it said.         

The bank has also suspended 20 officials concerned till investigations are completed, sources said. Meanwhile, another bank named in the sting operation Axis Bank said a thorough internal enquiry is already underway to look in to all aspects of the matter and the findings are expected shortly.