The Enforcement Directorate (ED) has arrested former National Stock Exchange (NSE) managing director and chief executive officer Ravi Narain in a money laundering case related to the alleged illegal phone tapping and snooping of NSE employees.

This comes a month after the probe agency arrested former NSE MD & CEO Chitra Ramkrishna for illegally tapping telephones of NSE employees between 2009 and 2017.

The Enforcement Directorate had in July filed a case under criminal sections of the Prevention of Money Laundering Act (PMLA) against ex-Mumbai police commissioner Sanjay Pandey, Ramkrishna and Narain.

The Central Bureau of Investigation too had registered a case against Ramkrishna, Narain and Pandey for alleged illegal interception of telephones of NSE staff.

The CBI also filed an FIR against a private company based in New Delhi, its former directors and other officials. The said private company was allegedly engaged in the guise of conducting 'Periodic Study of Cyber Vulnerabilities' at the NSE. It was further alleged that top officials of NSE issued agreement and work orders in favour of the said private company and illegally intercepted the phone calls of its employees by installing machines, in contravention of provisions under Indian Telegraph Act.

No permission for this activity was taken from the competent authority under the Indian Telegraph Act, according to the CBI. "No consent of the employees of NSE was also taken in this matter. It was also alleged that the transcripts of these calls were provided by said private company and received by the senior officials of NSE. An amount of ₹4.45 crore (approximately) was allegedly paid to said private company for this activity," the CBI said.

In June, market regulator Securities and Exchange Board of India (SEBI) imposed monetary penalties on the NSE, its former managing director and chief executive Chitra Ramkrishna and her key aide Anand Subramanian.

The market regulator, in its 186-page order, found Ramkrishna, Subramanian and India's largest stock exchange guilty of collusion in the 2015 dark-fibre case. While NSE was fined ₹7 crore, its former MD & CEO Ramkrishna, former group chief operating officer Subramanian and current chief business development officer Ravi Varanasi were asked to pay ₹5 crore each.

Ramkrishna was first arrested by the CBI in March this year for her alleged role in the NSE co-location scam. The case was registered in May 2018 for alleged abuse of the exchange's server architecture in 2015, in which some traders were provided preferential access to trade data.

Follow us on Facebook, Twitter, YouTube & Instagram to never miss an update from Fortune India. To buy a copy, visit Amazon.