Speaking to reporters at a joint news conference with his French counterpart, Foreign Minister Mevlut Cavusoglu reiterated that the S-400 deal had been concluded and that Turkey would take delivery of the S-400 missiles. The US will also cut Turkish defense firms from the F-35 program, costing Ankara a significant source of revenue. The Nato allies have sparred publicly for months over Turkey's purchase of the S-400s, which Washington has said could trigger USA sanctions.
USA acting Secretary of Defense Patrick Shanahan said last week he had sent a letter to his Turkish counterpart Hulusi Akar informing him of Washington's decision to pull Turkey out of the F-35 programme.
Turkey and US flags are seen in this picture illustration taken August 25, 2018.More news: Russian President Putin says US-Russia relations are getting "worse and worse"
The spokesman expressed confidence that the United States would deliver F-35 fighter jets to Turkey.
Following protracted efforts to purchase an air defense system from the US with no success, Ankara decided in 2017 to purchase the Russian S-400 system.
On Monday, US officials announced that Washington had halted the training of Turkish pilots on F-35 fighters at an airbase in the US state of Arizona.More news: Cricket chiefs deny World Cup TV 'gagging' order
Akar, cited by his ministry in a statement, said Ankara was working on a response to the letter and that it would be sent to the United States in the coming days.
As well as these immediate responses, the S-400 deal threatens to undermine Turkey's role in North Atlantic Treaty Organisation - a cornerstone of its security policy since it joined in 1952. On Wednesday, the two countries agreed a ceasefire in the Syrian rebel enclave of Idlib, where two million potential refugees lie on Turkey's border, but Moscow has yet to signal its willingness to share the technology that allows them to develop missiles, which is what Ankara really craves.
He also said that a meeting between Turkish President Tayyip Erdogan and Russian President Vladimir Putin is to be held in Japan.More news: Amanda Knox arrives in Italy to attend discussion on wrongful convictions
Russian Federation said on Tuesday it plans to deliver its S-400s to Turkey in July, setting the clock ticking on a USA threat to hit Ankara with sanctions if it goes ahead with the deal. Turkey will not stand idly by if it is ejected from the F-35 project for which it has already paid $1.25 billion, he also told members of his ruling party.