A new report released by the Washington-based conservative think tank, The Heritage Foundation, called on U.S. President Donald Trump to end the cooperation with the PKK terrorist organization's Syrian wing, the Democratic Union Party (PYD).

"Washington has few reliable allies inside Syria. Syrian Kurdish militias tied to the PKK are an effective military force, but close cooperation with them complicates relations with Turkey," the report released last Friday said.

According to the plans leaked to the U.S. media, the Pentagon intends to continue working with the PYD and its Arab allies, the Syrian Democratic Forces (SDF), in the upcoming Raqqa operation in Syria. Such a move requires the distribution of heavy weapons to the PYD and its allies, such as anti-tank weapons, mortars, armored vehicles and automatic weapons.

Ankara has been outspoken against the U.S.target="_blank"'>The foundation also has its disagreements with the administration over Russia's role in Syria. It severely opposes any American-Russian joint military operations in the region, and also considers safe zones as a risky initiative due to the fluid nature of the Syrian civil war. Instead, it offers to increase aid to regional countries that are hosting millions of Syrian refugees.