"CBI should interrogate Mamata Banerjee because the probe agency can't have two different yardsticks for two people. There was a meeting between Saradha chief Sudipta Sen, Banerjee and Mukul Roy in Delo in Darjeeling district, which Roy had publicly admitted,” Singh said.

"If the CBI called Mukul Roy for interrogation, then they should also call Banerjee under the same rule," he added.

Stating that "dissidence in the TMC is growing every passing day," the BJP leader said the party would not induct any Saradha scam-tainted leader when asked about the possibility of Roy joining the saffron party.

Referring to the February 13 bye-election to Bongaon Lok Sabha and Krishnagunj Assembly seats, he said development, Saradha scam, corruption and citizenship to Bangladeshi refugees would be the issues highlighted by the party.

Singh said the Narendra Modi government extended all help to Bengal, which was proven by the fact that two Union ministers had attended the Bengal global business summit in Kolkata and over Rs 70,000 crore investment was made by the Centre in different projects.

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