'Demand high-level probe': Trinamool disagrees with EC's 'no attack' on Mamata observation However, party spokesperson Sougata Roy expressed satisfaction that the EC agreed that there were security lapses and took action against some officials. Share Via Email | A+A A- Trinamool Congress supporter flashes victory during West Bengal Chief Minister Mamata Banerjee's rally during Nandigram Diwas in Kolkata. (Photo | PTI) By PTI KOLKATA: The TMC said on Sunday it disagrees with the Election Commission's observation that there was no pre-meditated attack on West Bengal Chief Minister Mamata Banerjee in Nandigram and demanded a high- level probe into the incident, insisting the inquiry by election observers lacks credibility.