Mexican tax demand prompts NAFTA challenge by mining firm ahead of 3 Amigos summit

A Canadian mining company's NAFTA challenge against Mexico could throw a wrench into the "Three Amigos" summit on June 29, when the leaders of Canada, the United States and Mexico will gather in Ottawa.

Primero Mining Corp., which owns the San Dimas gold-silver mine in Durango, Mexico, has launched the challenge against the Mexican government saying the Mexican tax authorities are trying to improperly collect more taxes from the company.

Ernest Mast, president and CEO of Primero, said that would cost the company nearly $100 million US.

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