Senior BJP leader and Union Minister of State for Education Dr Sukanta Majumdar today said that a CBI investigation should be conducted as early as possible into a Medical College and Hospital incident in Kolkata. Talking to media persons in New Delhi on the sidelines of a program, Dr. Majumdar said that the doctors are agitating over the incident and demanding a CBI investigation, however, Chief Minister Mamata Banerjee has not written a letter to the Union Home Ministry.