Trinamool Congress leader Mukul Roy reached CBI office here on Friday morning for questioning in the Saradha chit fund scam.br br Earlier yesterday, Roy said he would "fully cooperate" with CBI in its probe and claimed he had not committed any "immoral activity".br br "I will meet the investigating agency (CBI) tomorrow morning and fully cooperate in the investigation. But what I had said on the first day, I am repeating it today. I was never involved in any immoral activity individually or as the custodian of the party," he told reporters on Thursday.