"The partial (U.S.) drawdown (has) occurred at a time when these fighters need additional training and equipping to build trust with local communities and to develop the human-based intelligence necessary to confront resurgent (Islamic State) cells and insurgent capabilities in Syria", the report said.
A Turkish attack on Kurdish-led forces in northeast Syria would spark a "big war" if USA efforts fail to block Ankara's plans, a top Kurdish official told Reuters on Wednesday. Over U.S. objections, Turkey had argued for a larger safe zone and for sole Turkish control over the area.
"In that framework, to quickly create in Turkey a joint operation centre to coordinate and manage the implementation of the safe zone with the USA".
The Trump administration had worked furiously in recent weeks to head off a Turkish offensive against a USA -backed force in Syria that had led the ground offensive against the Islamic State militant group.
Turkey's top diplomat also delivered remarks on the Constitutional Committee of Syria and said the trilateral meeting - between leaders of Turkey, Russia and Iran - was slated for September 11 in Turkey. "But we said we wanted to act together with our friend and ally, the United States", state-owned Anadolu Agency quoted him as saying.
"This gives us room to take initial joint Turkish-U". He said he hoped this week's talks in Ankara would succeed.
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Neither side said whether they had overcome two main points that had divided them.
"(The United States) reached a point close to our proposal but a full agreement could not be reached", he said, adding that Turkey insisted on the full 32 kilometers, as Trump himself endorsed in a January tweet. "It is not normal for talks to go on this long", he said.
While Erdogan said an invasion is imminent, U.S. State Department officials have said that this week's talks in Ankara will override Turkey's expressed plans to send its troops into Syria.
"Turkey can not feel safe as long as this structure along our southern border, which is growing like a cancer, is not eliminated", he told Turkish diplomats in Ankara.
Turkey has in the past year reported that its soldiers have come under fire from the YPG in northern Syria.
"What really mattered here was the issue of this step being taken on the east of the Euphrates, and this is now being realized together with the Americans", he said.