The party office is located adjacent to the residence of former West Bengal Chief Minister and Trinamool Congress supremo Mamata Banerjee.
A team from the state investigative agency arrived at the premises along with personnel from Kalighat Police Station to carry out inquiries linked to the case.
The visit marks a significant development in the probe into the alleged forgery matter, with investigators seeking to collect evidence and verify information connected to the case.
Local police and central forces personnel have also reached the location.
CID officers have entered the party office to conduct investigative procedures as part of the ongoing inquiry.
The operation drew attention due to the office's proximity to Mamata Banerjee's residence.
Brief tension during investigation
According to reports, tension briefly surfaced at the premises when CID officers reportedly became involved in a verbal exchange with TMC leader and former Rajya Sabha member Subhasish Chakraborty, who was present there at the time and introduced himself as a voluntary caretaker of the party office.
The disagreement was reportedly related to the entry of the investigating team into the building.
However, the situation remained under control, and the inquiry continued.
CID team at Abhishek's Camac St office
Meanwhile, another team of the CID has entered Abhishek Banerjee's office at Camac Street.
CID team reaches Abhishek Banerjee's Camac Street office. Photo: IBNS
Local police from Shakespear Sarani Police Station have reached the scene and have cordoned off the office.
Probe continues
The CID has not yet issued an official statement regarding the purpose or findings of the visit.
The Trinamool Congress has also not released any formal response concerning the search operation.
Officials indicated that the investigation into the alleged signature forgery controversy is continuing, with the agency examining relevant evidence and information as part of its probe.
Abhishek Banerjee was summoned thrice for questioning by the CID in connection with the case, and he skipped all of them.