"We (TMC) are neither thieves nor frauds. If our party's involvement is proved under any circumstances, I will quit politics," Roy said.

"Is Saradha Mamata Banerjee's crime? No. If Mamata Banerjee had not tried to curb Sudipta Sen then would he have been arrested?" he asked.

Roy alleged that since Independence, CBI has always been used for political gains by the Centre.

"Here too CBI has been used to tarnish TMC's image. To protest against the canards being spread against us, our party workers will hit the streets from September 19 to September 22 in every village, block and town," he said.

He said that since CBI is investigating the matter it will have to ensure return of money to the depositors.

"You (CBI) will have to tell us as to how you will return the money," Roy said.

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