The Turkish president's remarks come after Turkey's Defence Minister Hulusi Akar was quoted saying that joint training of US and Turkish soldiers for patrols in Manbij had begun.
Turkey's Defence Minister Hulusi Akar says Turkey and US will soon conduct "common united patrolling activities" in the northern Syrian city, a deal two NATO allies agreed in June.
Turkey's President Recep Tayyip Erdogan and UN Secretary-General Antonio Guterres during a closed-door meeting discussed the Syrian conflict and measures undertaken for setting up a demilitarised zone in Idlib.
In a letter to The New York Times, Turkey's Foreign Minister Mevlut Cavusoglu warned that US-backed YPG terrorists have an alliance with Syrian regime leader Bashar al Assad and are sending forces to help him recapture Idlib.
Turkey's President Recep Tayyip Erdogan said that the country would continue the fight against terrorism until every last terrorist has been eliminated.
It's been two years since the Fetullah Terrorist Organisation attempted to overthrow the democratically elected government of Turkey on July 15, 2016. Much has changed in Turkey since then.
If the Manbij model is successfully implemented, eastern Syria could eventually become a joint US-Turkish zone of influence.
Turkey announced that it had launched Operation Olive Branch on January 20 to clear Syria's Afrin region of the YPG/PKK and Daesh, which Turkey considers a threat to its national security.
Turkish Chief of General Staff Hulusi Akar says Ankara will never allow its interests in the Aegean and Eastern Mediterranean to be compromised.
Turkish military and Turkish-backed Free Syrian Army forces advance in Syria's Afrin as Chief of General Staff General Hulusi Akar visits Sanliurfa, Hatay and Kilis to inspect troops taking part in Operation Olive Branch.
US Defense Secretary Jim Mattis says Washington and Ankara have had high-level communication about the operation and Turkey had informed the US before Operation Olive Branch started.
"Depending on developments, our grounds elements will carry out the necessary activities (on Sunday)," Turkish Prime Minister Binali Yildirim says.
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