Travel ticket agents Amadeus and Sabre face EU antitrust investigation

BRUSSELS (Reuters) - Electronic travel services companies Amadeus and Sabre are being investigated by the EU over contract terms that the bloc's antitrust watchdog says could prevent airlines and travel agents from switching to rival ticket agents.Airlines typically sell about 70 percent of their tickets via third parties such as travel agents but have a tense relationship with global distribution service (GDS) providers such as Amadeus and Sabre, which use software networks to sell products..