Mexico steps up antitrust rules against Slim's America Movil

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The America Movil logo is seen on the wall of the reception area in the company's corporate offices in Mexico City August 12, 2015. REUTERS/Henry Romero (Copyright Reuters 2017)

Billionaire Carlos Slim's America Movil said on Wednesday that the Mexican telecommunications regulator had stepped up antitrust rules against the company, including ordering it to separate out part of its fixed-line infrastructure.

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America Movil is controlled by the family of Slim, one of the world's richest men. It has been subject to tougher rules since a sweeping sector reform in 2013.

The company said in a statement to the stock exchange that it would challenge the new rules.

(Reporting by Christine Murray and David Alire Garcia)