Delhi Police personnel on Monday visited the residence of former West Bengal Chief Minister Mamata Banerjee to serve her a notice in connection with a 13-year-old case registered at Parliament Street Police Station in New Delhi, Kolkata Police sources said.

The notice was issued under Section 160 of the Code of Criminal Procedure (CrPC), seeking her cooperation in the investigation into an incident that took place on April 9, 2013.

The case was registered under Sections 186 (obstructing a public servant), 353 (assault or use of criminal force to deter a public servant from discharging official duty), 332 (voluntarily causing hurt to a public servant), 147 (rioting), 149 (unlawful assembly) and 34 (acts committed by several persons with a common intention) of the Indian Penal Code (IPC).

The incident dates back to April 9, 2013, when members of the Students' Federation of India (SFI) staged a protest against Mamata, then the Chief Minister of West Bengal, and the then Finance Minister Amit Mitra near the NITI Aayog office in New Delhi. During the protest, Mitra was allegedly manhandled by the demonstrators.

Ritabrata Banerjee, who was the SFI general secretary at the time and is currently the Leader of the Opposition in the West Bengal Assembly, was arrested in connection with the case.

The investigating officer has now issued a notice to Mamata Banerjee, seeking her cooperation as part of the ongoing investigation. The visit by Delhi Police personnel to her residence has triggered political interest in West Bengal, given the high-profile nature of the case and the passage of 13 years since the incident.