Ahead of the West Bengal assembly elections, Chief Minister Mamata Banerjee will start a sit-in here on Friday to protest against the alleged arbitrary deletions in the post-SIR electoral rolls in the state. The protest comes just two days before the proposed visit of the full bench of the Election Commission to the state. The sit-in, scheduled from 2 pm at the Esplanade Metro Channel in central Kolkata, was announced by TMC national general secretary Abhishek Banerjee on Sunday. He had accused the Election Commission of carrying out a "politically motivated" exercise that could disenfranchise lakhs of legitimate voters months ahead of the assembly elections. The protest marks a dramatic political escalation by the ruling party just days after the Election Commission published the post-SIR electoral rolls, which have significantly redrawn the contours of the state's electorate. According to official data released on February 28, 63.66 lakh names, around 8.3 per cent of the elector