US warns of possible sanctions on any country purchasing Russia's S-400

Baku. 24 August. REPORT.AZ/ US State Department doesn't rule out that a purchase of Russian S-400 air defense systems may cause sanctions on any country around the world, Report informs citing the Sputnik News.

US State Department's spokesperson Heather Nauert said during briefing that Washington was against a possible purchase of Russian S-400 air defense systems by its allies around the world.