Senior journalist Mathew Samuel, the man behind the Narada sting operation, said he is satisfied after the arrest of Trinamool Congress leaders.
Samuel, however, expressed surprise that the CBI did not arrest former TMC minister and incumbent BJP leader Suvendu Adhikari, who is also accused in the same case.
Samuel said that steps against corruption are needed and investigations should be fair.
The sting operation was conducted by Samuel of Narada News, a web portal, in 2014 wherein some people resembling TMC ministers, MPs and MLAs were seen receiving money from representatives of a fictitious company in lieu of favours.