Moscow considers U.S. pressure on Turkey over its buying Russian S-400 defense systems “unacceptable,” Russian Foreign Ministry spokeswoman Maria Zakharova said on Thursday.

Speaking at a news conference in Moscow, Zakharova said this attempt to pressure Turkey is out of bounds in the system of international relations.

“We consider this rhetoric unacceptable, since it is actually about pressure,” she said.

“There are examples of similar pressure by Washington on a number of other states, this is not only about Turkey, and not only about the S-400, and not only about topics related to Russia. In recent years, Washington has

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