Mexico City, Feb 26: The seventh round of the North American Free Trade Agreement (FTA) negotiations began in Mexico City with hopes of filising more sections. Negotiators from Cada, the US and Mexico held a closed door meeting on Sunday at a hotel in the city’s upscale Polanco neighbourhood, reports Xinhua news agency. Mexico said the first day of talks will see 27 different working groups hold discussions on agriculture, good regulatory practices and rules of origin, among others.