ANKARA, March 16. /TASS/. Turkey has no plans to integrate Russian-made S-400 long-range antiaircraft missile systems into the NATO structure, if they are purchased, Turkish Defense Minister Fikri Isik said on Thursday.

"The complexes that will be purchased won’t be integrated into the NATO system," the defense minister was quoted by the TV Channel Haber 7 as saying.

Isik said on Wednesday there was progress in purchasing S-400 systems from Russia but the sides had not yet reached the stage of signing the agreement.