"We condemn and reject the US decision, announced in connection with the supply of S-400 air defense systems, which includes unilateral sanctions against our country," the statement said.

According to the diplomats, Turkey will take the necessary measures against the US decision, which "will inevitably negatively affect" bilateral relations.

"Turkey will not refrain from taking measures that it considers necessary to ensure its national security," the ministry added.

The Turkish Foreign Ministry also stressed that the allegations of the vulnerability of NATO systems in connection with the acquisition of S-400 by Turkey have no technical justification.

They recalled that Turkey proposed creating a technical working group with the participation of NATO and resolving this issue on an objective and realistic basis.

On December 14, the US announced the imposition of sanctions against Turkey.

As US Secretary of State Mike Pompeo explained, they are being introduced due to Ankara's acquisition of the S-400.

Russian Foreign Minister Sergei Lavrov noted that such a decision did not come as a surprise - it was the use of illegitimate measures "left and right."