The bank had earlier on March 20 taken action against three officials—Group Head of Branch Banking Sampat Kumar, Executive Vice President of Middle East, Africa and NRI Onshore Business Harsh Gupta and Senior Vice President Payal Mandhyayan—for their alleged involvement in mis-selling of bonds. Sources said that now it has come to light that action has also been taken against 12 more officers. That means steps have been taken against a total of 15 officers.