Mamata Banerjee's Party Fumes As Centre Pulls Officers Over JP Nadda Attack Mamata Banerjee's Party Fumes As Centre Pulls Officers Over JP Nadda Attack The Union Home Ministry had summoned the chief secretary and police chief of West Bengal over the attack on JP Nadda's convoy earlier this week. Kalyan Banerjee said former BJP chief Amit Shah (in photo) of political vendetta. (File) Highlights Kalyan Banerjee helmed TMC bid on Friday to offset BJP's bombardment JP Nadda was to blame for stone-throwing at his convoy, he said Kolkata: Mamata Banerjee's party's tussle with the BJP over the attack on its chief JP Nadda's convoy rolled on to Saturday with the Trinamool Congress accusing Union Home Minister Amit Shah of "indirectly trying to impose emergency in Bengal... by terrorising IAS and IPS officers of the state".