Turkish purchase of Russian anti-missile system concerns U.S. - Mattis

WASHINGTON (Reuters) - U.S. Defence Secretary James Mattis said on Tuesday the United States was concerned about Turkey's purchase of a Russian missile defence system that cannot be integrated into NATO.

The United States has already warned Turkey that it would be subject to sanctions and its purchase of Lockheed Martin fighter jets would be jeopardized if Ankara does not drop plans to purchase the missile defence system.

"Clearly, Turkey bringing a Russian anti-aircraft, anti-missile system into a NATO country -- we cannot integrate that into NATO. Yes, it does concern us and we do not recommend that," Mattis told reporters.

(Reporting by Phil Stewart; Writing by Makini Brice; Editing by Doina Chiacu)