An FIR has been filed by the Central Bureau of Investigation (CBI) on Monday against 13 Trinamool Congress (TMC) leaders, including MPs and ministers in West Bengal government, in the Narada sting case.
Rajya Sabha MP Mukul Roy, Lok Sabha MPs Sultan Ahmed, Saugata Roy, Kakoli Ghosh Dastidar, Aparupa Poddar are among those named in the FIR.
Cases of alleged criminal conspiracy and corruption have been charged against them.
Narada tapes had shown them taking bribe on camera.
The case has been registered on the completion of preliminary enquiry by CBI, the people said.
The preliminary enquiry was registered on directions of a division bench of the Calcutta high court, comprising acting chief justice Nishita Mhatre and justice T. Chakraborti.
The Narada sting operation 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.
Kolkata Police have summoned Narada News CEO Mathew Samuel, who conducted Narada sting operation in connection with a case involving an extortion call to a former MP of Bihar.
In the summon sent to Mathew on Sunday, Muchipara Police station officer-in charge asked him to appear at the said station by April 20.
The Narada CEO, however, told that travelling for him was prohibited as doctors advised him complete bed rest for at least three months after a surgery.