At least 12,000 Turkish nationals have joined the Takfiri terrorists in Syria to fight against the Damascus government," Head of the Turkish Research Center 21 Century Umit Ozdaq told Taraf newspaper.
He noted that some of them have joined ISIL in Syria alone and some others with their family members.
Ozdaq also disclosed that 400 extremists from Northern Kazakhstan have joined the ISIL in Syria.
In November 2014, informed sources revealed that the Turkish Air has been transferring large groups of Takfiri terrorists from different countries to Syria and Iraq.
“The airliner transported 91 Takfiri Tajiks from Dushanbe to Istanbul at 21:10 on July 2 onboard flight 254,” a source, who asked to remain unnamed for fear of his life, told FNA at the time.
In October 2014, a Kurdish source disclosed that Turkish National Intelligence Organization (MIT) officials had held a series of meetings with the ISIL ringleaders in a Syrian border city to coordinate joint war operations against the Kurdish population.
"We have strong and irrefutable documents that the MIT has held numerous meetings with the ISIL ringleaders in a border city Northern Syria and during the meetings they have inked agreements against the Kurds," a member of the Kurdistan Workers’ Party (PKK) who introduced himself as Howal Veria told FNA.
"One of the paragraphs of the agreements pertains to the ethnic cleansing of Syria's Kurdistan and displacement and massacre of the Kurdish people," he added.
Veria warned Turkey to stop its continued policies against the Kurds, and said if the government of Turkish Prime Minister Recep Tayyip Erdogan continues its policies, over 45mln Kurds, Alawits and all other people who are opposed to Ankara's ISIL policies will rush to the streets to show their power to the Turkish premier.
In relevant remarks in September 2014, a PKK leader said that the Turkish government is in cahoots with the ISIL Takfiri militants operating inside Syria and neighboring Iraq.
"Ankara is collaborating with the ISIL terrorists, calling on fellow Kurdish fighters to cross into Syria to defend the Kurdish city of Kobani near the border with Turkey," Dursun Kalkan said.
In September 2012, a Debkafile report said that the Turkish army officers were directly commanding foreign terrorists in Northern Syria, including the cities of Idlib and Aleppo.
According to the report, militants in Idlib and Aleppo received orders from headquarters in the Southeastern Turkish city of Gaziantep.