Senior Trinamool Congress lawmaker Kalyan Banerjee wrote to Union Home Secretary Ajay Bhalla on Saturday, saying that West Bengal''s chief secretary and director-general of police were summoned to Delhi over the attack on BJP chief JP Nadda''s convoy with "political motive", asserting that law and order is a state subject.

Banerjee, the chief whip of the Trinamool Congress in Lok Sabha, alleged that the Centre was resorting to coercive means to intimidate the state administration, and the top officials were summoned at the instance of the Union Home Minister.