The Pentagon noted that it would continue training Turkish pilots on two F-35 fighter jets at Air Force Base in Arizona, despite disagreements between Washington and Ankara over the acquisition of the Russian s-400 system, Reuters reported.

"The training will continue at Luke Air Force Base," Pentagon spokesman Charlie Summers told reporters.

Asked if there was any plan to take those two jets back, Summers said: "We have no plan to do that."

Earlier it was reported that the US has halted the supply of equipment related to the stealthy F-35 fighter jet to Turkey. US officials told their Turkish counterparts they will not receive further shipments of F-35 related equipment needed to prepare for the arrival of the stealthy jet. Turkey produces some parts for the fighter.  In Turkey, produced some parts for the fighter: parts of the fuselage, chassis and cockpit displays.

Washington took this step because of the purchase of Russian S-400 air defense systems. The United States and other NATO allies fear the radar on S-400 would enable Russia to learn how to spot and track stealth jet.

On March 28, US senators introduced a bipartisan bill to prohibit the transfer of F-35 fighter aircraft to Turkey until the US government certifies that Ankara will not take delivery of a Russian S-400 air defense system.

F-35 is the fifth-generation combat aircraft. The F-35 first flew on 15 December 2006.