New Delhi says supplies of missile defence systems began this month, adding talks between leaders of Russia and India didn't figure Washington's warnings against the $5 billion purchase.
Ankara and Washington have engaged in series of negotiations to improve Ankara's aircraft fleet following a compensation of $1.4 billion after Washington removed the country from the F-35 Joint Strike Fighter program.
A 2017 US law aims at deterring countries from buying Russian military hardware.
Ankara aims to reach full domestic capability in airspace defence, which has seen multiple rocket attacks from neighbouring war-torn Syria.
Turkey's presidential spokesperson Ibrahim Kalin, addressed the unlawful nature of Turkey's exclusion from the F-35 programme, while highlighting the exceptions to the role made for other nations who purchased the S-400.
Turkey’s President Recep Tayyip Erdogan said Ankara was not stepping back from anti-terror operations, urging NATO ally US to stop its support of “terrorist organisations” in the region.
Washington is engaged with Ankara over "an F-35 dispute resolution," says US State Department spokesperson Ned Price, but adds he would not "prejudge the outcome of" those discussions.
With Washington rebuffing Ankara’s attempts to resolve festering bilateral issues, the shaky relationship between the two NATO allies doesn't appear to be turning the corner anytime soon.
The Turkish-Russian ceasefire in Syria has run its course, setting the stage for confrontation between Ankara and Moscow if a new buffer to smoothen tensions isn’t achieved.
President Erdogan says Moscow's decisions in the war-torn Syria are a threat to southern Turkey, urging President Putin to adopt a new approach "as a requirement of solidarity."
"I've worked well with Bush junior, I've worked well with Mr Obama, I've worked well with Mr Trump, but I can't say we started well with Mr Biden," says Turkish President Erdogan.
Turkey’s president also underlined that energy has emerged as a top category in cooperative trade between Turkish and American businesses.
Subscribe to our Youtube channel for all latest in-depth, on the ground reporting from around the world.
Copyright © 2022 TRT World.