Mitra, who was earlier named in the Saradha ponzi scam and spent several months in judicial custody, was probed to ascertain his involvement in the Narada tapes scam, CBI sources said.
The Narada tapes scam purportedly showed the Narada News CEO Matthew Samuels posing as a businessman and allegedly offering money to several TMC leaders.
CBI had earlier arrested Mitra in the Saradha ponzi scam where he was among the list of beneficiaries. He later got bail from the court.
Mitra had served the first Trinamool Congress government of Mamata Banerjee in the capacity of Sports and Transport ministers.
Both the CBI and the ED are concurrently probing the Narada tapes scam.
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