US Secretary of State Mike Pompeo has said, the US did not give Turkey a “green light” for its offensive in northern Syria,
Mr Pompeo defended US President Donald Trump’s decision to withdraw US troops from the border area, which has sparked an outcry at home and abroad.
Turkey has now launched an assault on territory held by Kurdish-led forces.
Turkish President: Recep Tayyip Erdogan said, the aim was to “prevent the creation of a terror corridor” on the border.
Kurdish-led forces have vowed to resist the offensive, and have already clashed with Turkish troops.
The Kurds helped defeat the Islamic State group in Syria, and were key US allies in that fight.
They presently guard thousands of IS fighters, in prisons and camps in areas under Kurdish control.
It is unclear whether they will continue to do so, if battles break out.