Turkish President RecepTayyip Erdogan's spokesman Ibrahim Kalin denounced efforts by the US-led coalition to train a border security force in northern Syria including Kurdish YPG fighters as worrying and unacceptable.
Kalin said that, instead of ending support for the YPG, as Ankara has requested, "the US is taking worrying steps to legitimise this organisation and make it lasting in the region. It is absolutely not possible for this to be accepted."
"Turkey will continue to take all necessary precautions aligned with its national interest to preserve its national security," Hurriyet daily cited him as saying.
US support for the SDF has put enormous strain on ties with NATO ally Turkey, which views the YPG as a terrorist group for its link with the Kurdistan Workers’ Party (PKK).