The PYD/YPG terror group on Sunday took control of the Tabqa Dam in northern Syria from Daesh, local sources told Anadolu Agency.
They said a group of 650 fighters captured the dam with air support from the U.S.-led anti-Daesh coalition.
The operation to take the dam, located southwest of Raqqa on the Euphrates, was announced by the coalition earlier this week.
The coalition said in a statement Sunday it was taking measures “to preserve the integrity of the dam as a vital resource to the people of Syria".
The statement noted that the Syrian Democratic Forces (SDF) supported by the coalition was in control of a spillway north of the dam.
The SDF includes in its ranks fighters from the YPG, the armed wing of the PYD. Ankara views the PYD as the Syrian offshoot of the PKK terror group.
Turkey, the U.S. and the EU have designated the PKK a terrorist organization, but neither the U.S. nor the EU have followed Turkey's lead on the YPG.