A Turkish unilateral military operation in northeast Syria if launched would be unacceptable and Ankara should consult with the United States to address the security situation, Defense Department spokesperson Cmdr. Sean Robertson told Sputnik.
Earlier, Ankara announced that the Turkish military would launch an operation against Kurdish forces.
The United States believes that the High Level Working Group on Syria with its Turkish partners is the only way to secure the northeastern border area in a sustainable manner, Robertson said.