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Chile Supreme Court rejects LATAM tie-up with American, British Airways and Iberia

SANTIAGO, May 23 (Reuters) - Chile's Supreme Court on Thursday struck down a joint business agreement between LATAM Airlines, the region's largest carrier, and American Airlines, British Airways and Iberia Airlines, upending an earlier approval by Chilean antitrust regulators.

Chilean consumer advocacy group Conadecus appealed the initial regulatory approval last October over concerns it could increase fares and lower quality on routes.

Authorities in Uruguay, Colombia and Brazil each approved the deal last year. (Reporting by Erik Lopez; writing by Dave Sherwood; editing by Jonathan Oatis)