West Bengal Chief Minister Mamata Banerjee. Partha Paul A day after polling concluded in the West Bengal Assembly election on Wednesday (April 30), Chief Minister and All-India Trinamool Congress (TMC) chairperson Mamata Banerjee on Thursday night hit out at the Election Commission of India (ECI) and the BJP. She alleged that there had been an attempt to tamper with the electronic voting machines (EVMs) stored at a strongroom till counting of votes on May 4. Banerjee camped for hours , until midnight, at one such strongroom location in Kolkata , while asking all party candidates to guard the strongrooms and counting centres in their respective Assembly constituencies. West Bengal Chief Electoral Officer Manoj Agarwal denied the charge, saying the ECI’s statutory procedure was followed. As per the ECI, a video released by the TMC alleging tampering actually showed the segregation of postal ballots being carried out at a strongroom after informing all candidates.…