New Delhi/ Kolkata, Dec 13 (ANI): Political leaders mounted pressure on West Bengal Chief Minister Mamata Banerjee on Saturday, a day after one of her senior ministers Madan Mitra was arrested by the CBI in the multi-million dollar Saradha scam. Mitra is the third senior member of Banerjee's regional Trinamool Congress who has been arrested by CBI for their involvement in the scam. Earlier, Kunal Ghosh and Srinjoy Bose were also arrested by the police in connection with the scam.