KOLKATA — The West Bengal police force, which reports administratively to the state government whose party workers are alleged to have disrupted opposition campaign activities in Murshidabad district, has once again failed to take precautionary measures despite advance notice, according to complaints filed with the Election Commission of India, which has confirmed it is seeking a detailed report.

Central paramilitary forces intervened on Sunday after Trinamool Congress supporters raised party flags and shouted slogans at Congress candidate Adhir Ranjan Chowdhury during his campaign in Berhampore, a constituency the five-time former Member of Parliament previously represented in the Lok Sabha. Mr. Chowdhury, who lost his Lok Sabha seat in 2024 to a cricketer fielded by the Trinamool Congress by a margin of 70,000 votes, said campaign programmes were being conducted with the full knowledge and permission of the Election Commission.

"We will not stop," Mr. Chowdhury said, in a statement that election observers noted was necessary to make.

A police official confirmed that disciplinary action had been initiated against the inspector-in-charge of Berhampore police station and that four individuals had been named in a case of unlawful obstruction. The official said the steps were taken after tensions escalated, which is when steps are typically taken.

In south Kolkata, an FIR was separately registered against Trinamool Congress candidate Ratna Chattopadhyay for alleged vandalism in the Parnasree area during election campaigning. The Election Commission confirmed it had sought a report from district authorities. "Any violation of the Model Code of Conduct will invite appropriate action as per law," an Election Commission official said, using language that has appeared in Election Commission statements about West Bengal in 2021 and 2024.

The Trinamool Congress won 213 of 294 Assembly seats in the 2021 elections. In the two Muslim-majority districts of Murshidabad and Malda, where Congress retains its strongest presence, the party won 28 of 34 seats amid similar complaints of campaign disruption. The Congress-Left Front alliance, which contested those elections together, won no seats in either district. The Congress is contesting this election without the Left Front, having concluded that an alliance that won zero seats offered diminishing returns.

The Election Commission, which has already replaced Tamil Nadu's Director General of Police and suspended four West Bengal police officers over a separate lapse at a BJP nomination rally, said it was monitoring the situation. Officials confirmed that the commission's monitoring of the situation in West Bengal has been ongoing, in a phased manner, since approximately 2011.