Senators Chris Van Hollen and Lindsey Graham called on US Secretary of State Mike Pompeo to impose sanctions against Turkey in case of violation of its obligations to ceasefire Syria, Euronews reported.

According to the source, lawmakers have prepared a letter to the US Secretary of State.

“On several occasions, President Trump has threatened to ‘destroy Turkey’s economy’ should Turkey violate its obligations,” they wrote in the letter. “In keeping with this position, we ask that the Administration take swift measures to enforce the October 17 agreement with tough economic sanctions.

Ankara announced the operation in northern Syria at the beginning of October with the goal of creating a buffer zone there.

On October 17, the United States and Turkey reached an agreement to suspend hostilities. Turkey agreed to cease fire for 120 hours so that the Kurdish forces that form part of the Syrian Democratic Forces coalition leave the border security zone created by Ankara.

On October 22, Russian and Turkish presidents Vladimir Putin and Tayyip Erdogan at a meeting in Sochi adopted a memorandum on joint actions to resolve the situation in northeast Syria.