Turkey had waged a fresh offensive against the Kurdish forces in the North Syrian town of Jarablus earlier this week. Photograph: (Getty)
The recent escalation of war in North Syria between the two forces has prompted the Pentagon to intervene
The United States has asked warring Turkish and Kurdish forces to back off and focus on their common enemy IS in Syria.
"We are closely monitoring reports in (sic) Jarablus (a town in South Syria) -- where ISIL is no longer located -- between the Turkish armed forces, some opposition groups, and units that are affiliated with the SDF (Kurdish-led Syrian Democratic Forces)," said Pentagon spokesman Peter Cook.
Pentagon was referring to the recent escalation of war in North Syria, where both the Turkish force and the US-backed Kurdish-led alliance in Syria lost their men.
"We want to make clear that we find these clashes unacceptable and they are a source of deep concern," the spokesman further said.
The US was kept in the dark about the recent fighting raging in North Syria.
The United States "was not involved in these activities, they were not coordinated with US forces, and we do not support them," the spokesman added.
Turkey, meanwhile, has said it will continue to attack Kurdish forces unless they retreat east of the Euphrates river.
The animosity between the Kurdish-led SDF and Turkey runs long and deep. SDF has a strong presence of People's Protection Units (known as YPG due to Kurdish initials), a group viewed by Turkey as a terrorist organisation.
That is because the YPG is an offshoot of the Kurdistan Workers Party (PKK), which has waged a three decade-long insurgency in Turkey.
(WION with inputs from agencies)