Turkey is not happy that the US has continued to support and arm Syrian Kurdish fighters, and their foreign ministry has summoned the top US diplomat in the country to voice its “discomfort” over the situation.

Turkey’s state-run media, the Anadolu news agency quoting government sources, said that US Embassy Charge d’Affaires Phillip Kosnett was summoned to the ministry. Kosnett is the most senior US Embassy official in Turkey since Ambassador John Bass departed in 2017. No replacement has been named yet.

The People’s Protection Units (YPG), the armed wing of the Syrian Kurdish Democratic Union Party, or PYD, is seen by the US as the most effective ground partner for the US-led coalition fighting ISIL in Syria.

The YPG has received arms shipments and training from the US, in a move that angered Turkey which considers the Kurdish forces to be a “terrorist group” that threatens its security.