Kolkata, Mar 11 (ANI): A TMC delegation comprising of MP Derek O’Brien, state ministers Chandrima Bhattacharya and Partha Chatterjee reaches the Election Commission office in Kolkata to file a complaint in the case of the alleged attack on Mamata Banerjee in Nandigram. While addressing the media there, TMC leader Derek O’Brien said, “Those responsible for this heinous incident need to be brought to book. It was in such poor taste that within 30 minutes, there were other kinds of statements. We condemn those statements. Talk to doctors and see what happened”.