Turkey summoned the US ambassador on Tuesday after John Kirby, US State Department spokesman said, unlike Turkey, the US does not recognize the PYD as a terrorist organisation, a Turkish Foreign Ministry official announced.
Turkey considers PYD as the PKK's Syrian extension, which is recognised as a terrorist organisation by Turkey, the EU, and the US.
The US supports the PYD in its fight against DAESH terror organisation in Syria.
John Kirby said on Monday, "This is not a new concern, as I said, that the Turks have proffered. And we don't, as you know, recognise the PYD as a terrorist organisation."
Many human right organisations accuse PYD of committing war crime against civilians in Syria under the cover of fighting against DAESH.
Recently, Amnesty International stated PYD is committing war crimes in northern Syria by forcing thousands of Kurdish and non-Kurdish civilians out of their homes and demolishing entire villages.
"Elsewhere, for example in Abdi Koy village, a small number of Kurdish residents have also been forcibly displaced by the YPG," the report read.
London-based Syrian Network for Human Rights (SNHR) also said last month PKK’s Syrian affiliate PYD has committed significant human rights violations in northern Syria, including "ethnic cleansing massacres" since the withdrawal of Syrian regime forces in 2012.