West Bengal's ruling Trinamool Congress' state general secretary Shankudeb Panda was on Wednesday interrogated by the CBI in connection with the Saradha scam.Summoned by the CBI, Panda, earlier attached to the Saradha Group as a journalist, appeared before the agency office in the morning."He is being questioned about his involvement with the Saradha group," said a CBI officer. The journalist-turned-politician was grilled in December last by the Enforcement Directorate which too is probing the multi-crore scam in which several Trinamool leaders have been indicted.Former state transport minister and senior Trinamool leader Madan Mitra is currently behind bars for his alleged complicity in the scam.