Kolkata: A case was registered against BJP IT cell chief Amit Malviya by Bidhannagar Cyber Crime Police, following a complaint by a Salt Lake resident that he posted a derogatory and defamatory comment about CM Mamata Banerjee.According to the FIR, Malviya, in a post on X, described Banerjee as the "Queen of thieves" and claimed that she addressed a rally of "illegal Rohingya infiltrators and known criminals". The complainant said the post was false, defamatory and aimed at misleading the public, provoking disorder and disturbing communal harmony.Police registered a case under multiple sections of BNS, including 196 (spreading false information), 352 (insult to provoke breach of peace), 353(1)(6) (statements conducing to public mischief) and 79 (gesture and act intended to insult the modesty of a woman).