The Turkish Foreign Ministry summoned on Wednesday the US charge d‘affaires to voice its disappointment over Washington’s arming and training of the Kurdish People’s Protection Units (YPG) in Syria, sources from the ministry said. In Washington, a State Department spokesman confirmed the meeting occurred but said “beyond that we aren’t going to read out any details of the conversation.” Turkey and the United States have been at loggerheads over Washington’s policy of support for the YPG, which Ankara views as an extension of the Kurdistan Workers Party (PKK) that has waged an insurgency in Turkey’s largely Kurdish southeast for more than three decades. The YPG is the main element in a force that Washington has assisted with training, weapons, air support and help from ground advisers in the battle against ISIS. Ankara meanwhile views it and the PKK as terrorist groups. It has repeatedly condemned Washington’s support for the YPG.