New Delhi/ Kolkata, Feb 01 (ANI): The Central Bureau of Investigation (CBI) arrested former Congress MP Matang Singh in Kolkata city in connection with Saradha chit fund scam case. The Enforcement Directorate too had reportedly questioned Singh in Delhi earlier. Spokesperson of CBI, Kanchan Prasad said Singh has been booked under the charges of cheating and criminal conspiracy. On Friday, CBI had questioned a powerful aide of West Bengal’s Chief Minister Mamata Banerjee, Mukul Roy. Roy had so far avoided appearing before the CBI since he was summoned on January 12.