Islamic State militants are "living their final moments" in the last enclave they hold near the Iraqi border, where U.S.-backed Syrian Democratic Forces (SDF) are attacking them, an SDF official said on Sunday.
A defeat of the jihadis in the enclave would wipe out Islamic State's territorial foothold on the eastern bank of the Euphrates River.
A spokesman for the U.S.-led coalition said the SDF were making "great progress ... but the fight continues."