While alliance members are displeased with Ankara-Moscow deal over supply of Russian S-400, Turkey assures that it will remain NATO's close ally.

Turkey’s decision to purchase Russia’s S-400 air missile defense system caused great concern among Ankara’s western partners.

Russia and Turkey are discussing terms of a loan for the acquisition of Russian S-400 air missile defense system, Turkish President Recep Tayyip Erdogan said.

Turkey continues talks with Russia to buy its S-400 air missile defense system, Turkish Prime Minister Binali Yildirim said, the country’s media reported June 20.