Turkish Foreign Minister Mevlut Cavusoglu accused the U.S. Special Presidential Envoy for the Coalition Forces to counter Islamic State (ISIS), Brett McGurk, of supporting Kurdish forces in Syria, and called for the removal of McGurk from his position. “Brett McGurk, the USA’s special envoy in the fight against Daesh [Islamic State], is definitely and clearly giving support to the PKK [Kurdistan Workers’ Party] and YPG [People’s Protection Units]. It would be beneficial if this person is changed,” Cavusoglu told NTV television on Thursday (May 18). Turkey sees the YPG and the Democratic Union Party (PYD) as “terrorist organizations” as it says they have ties with the PKK, which is designated as a terror group by Turkey, the U.S. and the EU. The comments by the Turkish foreign minister came after McGurk, along with officials from the State Department, paid a visit to Syrian Kurdish controlled areas on Tuesday (May 16) in order to meet Kurdish officials there. Turkish President Recep Tayyip Erdogan said he told U.S. President Donald Trump that Turkey would not hesitate to attack if it faced any sort of attacks from the YPG, according to Turkish media. “We clearly told them this: if there is any sort of attack from the YPG and PYD against Turkey, we will implement the rules of engagement without asking anyone”, Erdogan said being cited by Sabah newspaper. In the battle to free Raqqa from ISIS, the U.S. has actively supported the YPG-led SDF, but was initially wary of allying directly to the YPG due to concerns from NATO ally Turkey. U.S. ties with the Syrian Kurds have grown deeper despite the concerns of NATO ally Turkey, which views the YPG as a terrorist group because of its links to the PKK.