BJP national general secretary Siddharth Nath Singh said the investigation was slowly leading to Banerjee's doorstep and Madan Mitra's arrest showed the TMC leadership was neck deep in the multi-crore scam.

"It is time for Mamata Banerjee to resign taking moral responsibility. Mitra's arrest shows that the TMC leadership is neck deep in the Saradha scam and the dots are leading to Mamata Banerjee's doorstep," Singh said.

"While addressing a rally last year Mamata Banerjee had said is Kunal a thief, is Madan a thief, is Srinjoy a thief, is Mukul a thief, am I a thief? Now Kunal, Srinjoy and Madan are behind bars. It is Bhag Madan Bhag in 2014. It will be Bhag Mukul Bhag in 2015 and Bhag Mamata Bhag in 2016," Singh told a news channel later.

Leader of Opposition in the state Assembly Surjya Kanta Mishra demanded immediate interrogation of the Chief Minister including others in the Saradha scam.

"Mamata Banerjee should be quizzed immediately in the Saradha scam," Mishra, a CPI(M) Politburo member, said.

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