The CBI is waiting for the Lok Sabha speaker’s nod to prosecute four political leaders in the Narada sting case, including BJP’s Suvendu Adhikari  a senior official said on Tuesday, scotching allegations of biasness against the agency by several quarters.

The CBI had on Monday arrested two state ministers, one MLA and a former party leader. They were purportedly caught accepting bribes on camera. It has “sought permission from the Lok Sabha Speaker to prosecute Adhikari, Saugata Roy, Prasun Banerjee and Kakali Ghosh Dastidar”, who were all TMC MPs when the sting was allegedly conducted, the official said.