West Bengal Congress spokesperson Kaustav Bagchi was arrested on Saturday after a huge team of the Kolkata Police raided his residence around 3.30 am over his comments against Chief Minister Mamata Banerjee. Bagchi, also a lawyer at the Calcutta High Court, was arrested from his residence in Barrackpore in North 24 Parganas district based on a complaint filed at the Burtolla police station in Kolkata, around 22 km away. Criticizing the chief minister for making "personal attacks" on state Congress president Adhir Ranjan Chowdhury, Bagchi on Friday threatened to circulate a controversial book written by a former TMC MLA about Banerjee -- first at a press conference and then, on TV shows.