President Recep Tayyip Erdogan broke his silence over a United States threat to punish Turkey with sanctions should it buy an advanced Russian S-400 missile-defence system, saying the purchase is a "done deal".
In an interview with broadcaster Kanal 24, Erdogan said it would be "immoral" for Turkey to turn back from its deal with Russian Federation.
However, the U.S.' unwillingness to share their technology drove Turkey toward Russia to purchase the Russian-made S-400 defense system. Ankara insists the S-400 offers the best value for its needs and poses no threat to North Atlantic Treaty Organisation systems.
The comments come as part of this week's back-and-forth between Ankara and Washington on the issue.
Patriot defence systems are continuing, Akar said, adding that the S-400 systems would begin to be installed in October. "So I would hope they would reconsider this one decision on S-400 - one system - but potentially forfeit numerous other systems and... one of the most important systems that we can provide".
At the same time, Turkey has helped finance the F-35 program and planned to buy 100 of the jets from the USA, the first of which are due to be delivered later this year.
Russian S-400 missile air defence systems on display during a parade marking the 73rd anniversary of the victory over Nazi Germany in World War Two, at Red Square in Moscow, May 9, 2018. "We have reached an agreement with the Russians", Erdogan told Turkey's Kanal 24 television station earlier this week.
U.S. and North Atlantic Treaty Organisation officials have repeatedly complained that the Russian S-400 could not be integrated into the North Atlantic Treaty Organisation defence system.
Some have said the USA is concerned that the S-400 poses security risks to the F-35 Joint Strike Fighter project. But Congress previous year ordered a delay in future deliveries.
"'How can Turkey trust this supplier, who is threatening not to deliver F-35s, and buy Patriots after canceling its purchase of the Russian S-400s?" wrote a columnist in Hurriyet Daily News, Turkey's leading newspaper.
FILE - A Lockheed Martin F-35 Lightning II fighter jet is seen in its hangar at Patuxent River Naval Air Station, in the eastern US state of Maryland, Oct. 28, 2015. "God willing, we will receive the first system in July".
North Atlantic Treaty Organisation member Turkey has repeatedly said it is committed to buying the Russian missile defence system, despite warnings from the United States that the S-400s can not be integrated into the North Atlantic Treaty Organisation air defence system.