The agency has registered case of alleged criminal conspiracy and corruption against Rajya Sabha MP Mukul Roy, Lok Sabha MPs Sultan Ahmed, Saugata Roy, Kakoli Ghosh Dastidar, Aparupa Poddar, among others, CBI sources said.
An IPS officer has also been booked in the case, the source said.
The case has been registered on the completion of preliminary enquiry (PE) by the CBI, they added.
The Narada sting tapes, which were released to different news organisations before the 2016 assembly elections in West Bengal, showed people resembling senior TMC leaders receiving money allegedly for giving future favours.