Turkey's Interior Minister said on Wednesday that around 100,000 Syrians living without approval in Istanbul had left it since early July, when the government set a deadline for Syrians not registered in the city to leave for other provinces.
As sentiment towards Syrian refugees among Turks began to sour in recent years, authorities said Syrians not registered in Turkey's largest city should return to the provinces in which they are registered by Oct. 30, or face forced removal.
Turkey hosts some 3.6 million refugees who fled the eight-year-old civil war, more than any other country. The Syrian population in Istanbul, home to some 15 million people, had swollen to more than half a million, more than those in any other Turkish city.
Syrians registered in other cities came to Istanbul, leading to an acculumation in the city, Interior Minister Suleyman Soylu told parliament.
"Around 100,000 Syrian have returned to provinces in which they are registered since July 12," he said, adding that a total of 200,000 migrants had left the city.
Turkey also houses migrants from other Middle Eastern and African nations.
On Friday, the Istanbul governor's office said more than 6,000 Syrian migrants in Istanbul were sent to temporary housing centres in other provinces since early July.
Ankara wants to settle some Syrian refugees in a swathe of land it now controls in northeast Syria, after it launched an offensive last month against the Kurdish YPG militia.
Amnesty International and Human Rights Watch last month published reports saying Turkey is forcibly sending Syrian refugees to northern Syria. Turkey's Foreign Ministry called the claims in the reports "false and imaginary."
Turkey has deported 86,625 illegal migrants so far this year, compared to 56,000 in all of 2018, Soylu said.