Russian S-400 anti-aircraft missile systems may be deployed in Ankara or in Istanbul, Turkish National Defense Minister Hulusi Akar said, Trend reports referring to Turkish media.

Turkey may temporarily store Russian S-400 anti-aircraft missile systems in Azerbaijan, Trend reports referring to Turkish media. It is possible that the missile systems will be also sent to Qatar for a temporary storage.

A number of Middle East and Southeastern Asia countries have shown interest in purchasing Russia’s S-400 missile systems and talks are underway now, Russian Defense Minister Sergey Shoigu said on January 23 in the course of his visit to Vietnam.

Turkey said Friday it has signed an agreement with Russia for the purchase of the S-400 missile defense systems, Anadolu reported.

Turkey and Russia will sign a final agreement on the allocation of a loan for the purchase of S-400 Triumph air defense systems December 29, the Turkish media quoted the country’s President Recep Tayyip Erdogan as saying.

The value of contract to deliver Russian S-400 air defense missile systems to Turkey stands at $2.5 billion, the head of the state corporation Rostec, Sergei Chemezov, said in an interview with the Kommersant daily, TASS reported.

The control system of Russian anti-aircraft missile systems S-400, which Turkey will acquire from Russia, will be under control of the Turkish side.

The North Atlantic Treaty Organization (NATO) is still worried over Turkey's decision to purchase Russian military equipment.

Turkey and Russia will start joint production of the S-400 air defense missile system.

The upcoming talks between Turkish President Recep Tayyip Erdogan and his Russian counterpart Vladimir Putin right after Turkish leader’s meeting with U.S. President Donald Trump piques international community’s interest.