KOCHI: BJP leader K Surendran has come forward criticising West Bengal chief minister Mamata Banerjee who took CBI officers into custody while they arrived to interrogate Kolkata police commissioner Rajiv Kumar in connection with the Sarada chit scam. “The chit fund scam was handed over to CBI by the Supreme Court. Bengal CM has been sabotaging this case using her influence. We saw an example of this on Sunday. CPM in Bengal has backed the central government’s decision, however, will they agree with the CBI stand that CPM leadership should also face the investigation?”, asked Surendran.