Peoples' Democratic Party (HDP) Co-Chair Selahattin Demirtaş has been in a war of words with Prime Minister Davutoğlu, saying: "The YPG [People's Protection Units] will cross the Euphrates River and you will gawk [look on] at it."The quarrel started after Davutoğlu said that the Democratic Union Party's armed YPG, a Syrian PKK affiliate, was hit by Turkish military forces twice in recent days as they were trying to cross the Euphrates. Speaking in a live interview on A Haber channel, Davutoğlu said Turkey had previously warned members of the YPG not to cross to the western side of the Euphrates and that if they did, Turkey would interfere. "We struck twice," he said, without giving further information.Demirtaş responded to Davutoğlu earlier on Tuesday: "It is shameful to hit the PYD while ISIS maintains its presence in the region." Speaking on a live TV broadcast on Tuesday evening, Davutoğlu responded to Demirtaş: "Demirtaş is the one who needs to be ashamed; the PYD will not cross the Euphrates."Demirtaş commented on Davutoğlu's remarks regarding Turkey striking the YPG. On Tuesday evening in Istanbul he said: "As if the YPG cannot cross to the west of the Euphrates. They will, Davutoğlu, the YPG will cross beyond the Euphrates and you will only gawk at them from the other side of the river."Turkey regards the PYD as a Syrian offshoot of the PKK, which has carried out terrorist activities in Turkey since 1984. Ankara has warned Syrian Kurds to stay away from any attempts to create a "de facto situation" in Syria.In recent weeks, the United Nations Independent International Commission of Inquiry on Syria said in its latest report that the YPG has committed human rights violations in areas it controls in northern Syria. "Following the YPG's retaking of the previously ISIS-controlled areas of Tal Abyad in early July and villages in the Tal Tamer region of al-Hasakah, YPG fighters reportedly looted houses belonging to Arab villagers. The commission has always reported on violence committed by the YPG in previous reports," the report said.Ankara has repeatedly warned the PYD about its actions concerning "demographic change" and "ethnic cleansing" in northern Syria.