Turkey said last week that about 1,200 IS militants were in Turkish prisons and 287 IS members, including women and children, were captured during Turkey's offensive in Syria, launched last month. Athens said he was refused entry when he tried to cross the no man's land between the two countries to the Greek town of Kastanies.
Under the 10-point agreement, Turkey will retain control of the area it seized during the offensive it launched on Oct 9, which was green-lighted by President Donald Trump when he ordered USA troops to pull back.
Footage captured by USA surveillance aircraft over northern Syria has documented several incidents that military officials say may constitute war crimes on the part of Turkish-backed forces there, a US official said.
The fate of foreign IS fighters has been a key question since the defeat of the group in territory it controlled in Syria and Iraq.
The US is angry over the long-term detention of Turkish citizens working for US consulates, while Turkey continues to push hard for the extradition of the Islamic cleric Fethullah Gulen, whom Mr Erdogan claims engineered a failed 2016 coup.
This outraged many in Congress, which saw the move as an abandonment of the Kurds, who died in large numbers while fighting alongside USA forces against Islamic State jihadists in the area.
There can be few more graphic illustrations than this of the unfinished business left over from the US-led Coalition's military campaign to defeat IS.
Soylu said that he expects the same cooperation from other countries in the fight against terrorism.
Following the final battle against IS at Baghuz in Syria in March, thousands of IS fighters and their dependants were interned in camps.
Relations between the two sides have reached a nadir after the strategic partners lurched from crisis to crisis on a host of issues in recent years.
Kobani is wanted by Turkey.
Turkey's current expulsions now threaten to force them into action.
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Turkey began deporting foreign Islamic State (Isil) suspects on Monday. The 28-year-old Dane citizen had been arrested on his arrival in Copenhagen, while the German ex-fighter had been also expelled.
Birol Baskan, a scholar at the Middle East Institute, says Turkey needs the USA on its side to balance Russian Federation and Iran's interests in Syria.
Turkey has not confirmed whether those being repatriated were seized in Syria, or in Turkish territory. Kobane said that the SDF could not foretell what will happen to these prisoners.
Relatives of suspected IS militants were also being held at a number of camps for displaced people - the largest of which, al-Hol, housed nearly 70,000 people.
A key witness told the impeachment inquiry Mr Trump told a United States diplomat he "cared more" about Ukraine investigating his Democratic rival Joe Biden than about the country itself. "We will do everything possible to prevent returnees with links to IS becoming a threat in Germany".
"I think there are many people who don't know this but it's true".
Turkey's warning came despite the unwillingness of Europe states to take them in, with the United Kingdom in particular even going so far as to strip known jihadis of their citizenship. In response, Washington removed Turkey from the F-35 fighter jet program, in which Turkey was a manufacturer and buyer.
The meeting is expected to cover bilateral relations and foreign policy issues, including Syria.
How will the repatriations work?
Ministry spokesman Ismail Çataklı said one American and one German were deported on Monday.
A further 90,000 men, women and children with links to Isis are now held in Kurdish-run detention centres in Syria.