West Bengal minister Firhad Hakim said he was arrested by the Central Bureau of Investigation (CBI) on Monday, however, the agency maintained he was taken to its office for questioning in a corruption case. Trinamool Congress (TMC) leaders Subrata Mukherjee and Madan Mitra, and former Kolkata mayor Sovan Chatterjee, too, were brought to CBI’s Nizam Palace office in connection with case that is over five years old.