Turkey has dismissed French allegations as "groundless," insisting its vessels only observed the warship. It has accused the French ship of a "high-speed and dangerous manoeuvre."
"On one side, NATO sees Russia as a threat but on the other side, NATO ally France is working to increase Russia's presence there," Turkish Foreign Minister Mevlut Cavusoglu has said.
Russian S-400 air defence system is seen as one of the most advanced missile systems in the world, capable of tracking several targets simultaneously.
In response to Russia's alleged violation of INF treaty, United States says it will suspend its obligations under a landmark nuclear treaty in 60 days.
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