Turkey should not make excuses to the US for the purchase of S-400 anti-aircraft missile systems (SAM), said Advisor to the Turkish President Tayyip Erdogan Yasin Aktay.

According to him, Turkey “always” acts within the agreements with its allies, but the United States periodically “creates problems,” RIA Novosti reported.

The US cooperates with terrorists - the self-defense forces of the Syrian Kurds, whom the Turkish authorities consider a terrorist organization, he said adding that Turkey wanted to purchase the American Patriot air defense system, but the US did not respond positively to this.