The The Central Bureau of Investigation (CBI) registered an FIR against former Mumbai Police Commissioner Sanjay Pandey and former MD and CEO of NSE Chitra Ramkrishna in connection with the alleged illegal phone tapping of the stock market employees by the former's Information Technology company, officials told PTI on Friday. The CBI action comes following a complaint from the Union Home Ministry, they said.

Ramkrishna, who is in judicial custody in connection with NSE co-location scam, the CBI has also named another former National Stock Exchange (NSE) CEO and MD Ravi Narain in the case apart from Pandey. CBI has been conducting searches at 20 locations in Delhi-NCR, Mumbai, Pune, Kota, Lucknow, Chandigarh and other cities in connection with the FIR against Pandey, officials told PTI.