A day after BJP MP Swapan Dasgupta was allegedly locked inside a room at Vishwa Bharati University in West Bengal's Birbhum district, BJP leader GVL Narasimha Rao hit out at TMC supremo Mamata Banerjee alleging that there is a "demon rule" in the state. Gupta was confined in a room in order to prevent him from giving a speech in support of the CAA.