Turkey's foreign minister says his country won't bow to "ultimatums" after the United States warned Turkey it was excluding it from the F-35 fighter jet program overs its deal with Russian Federation to purchase its S-400 missile defense system.
Washington has suggested that Ankara instead purchase the USA -made Patriot air-defense system.
But Erdogan said Wednesday that his government would hold to account anyone who excluded Turkey from the F-35 program.
Touching on Turkey's procurement of F-35 fighter jets from the U.S., Erdoğan said his country is not only a customer, but also co-producer of the jets.
Mr Erdogan said he hoped to resolve the situation with the USA through phone diplomacy ahead of a meeting with President Trump at the end of June, Reuters reported.
"Turkey has already bought S-400 defense systems".
Turkey's President Erdogan says he hopes a Russian missile system that Washington sees as a threat to United States jets will be delivered in July. He noted that Turkey is also a manufacturing partner in the programme.
Turkey plans to buy 100 F-35s.
Turkey, however, emphasized the S-400 would not be integrated into North Atlantic Treaty Organisation systems and would not pose a threat to the alliance.
"But before there, we would like to discuss this issue (on the F-35 program) by telephone and reverse it from the current situation back to where we started", Erdogan said in a televised speech.
Shanahan said on Friday the United States offer for the Patriots was "very competitive" but Erdogan said Russian Federation offered a better deal including reasonable pricing and a joint-production promise.
"This is not an attack system but a defense system".
"We have so far paid $1.250 million", he said.
"Did we ask for such a defence system from America?"
They did not say how long the ceasefire would last.
"These regard first of all the completion of the contract to supply S-400 anti-aircraft missile systems to Turkey", Putin said before suggesting that there were other military projects in the pipeline.
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.