The United States has finished transferring over 5,700 suspected ISIL detainees from Syria to Iraq. The mission lasted 23 days, starting on January 21. US Central Command (CENTCOM) shared this news on X on Saturday. A final night flight on February 12 moved the last detainees from northeast Syria to Iraq. CENTCOM said this was done "to help ensure ISIS detainees remain secure in detention facilities." The detainees were held for years in Syrian prisons run by the Kurdish-led Syrian Democratic Forces (SDF). After Syrian government forces regained control of nearby territory, the US took over the transfer. Iraq’s National Centre for International Judicial Cooperation (NCIJC) confirmed 5,704 detainees have arrived. They represent 61 nationalities, including 3,543 Syrians, 467 Iraqis, 710 from other Arab countries, and more than 980 foreigners from Europe, Asia, Australia, and the US. CENTCOM head Admiral Brad Cooper said, "We appreciate Iraq’s leadership and recognition that transferring the detainees is essential to regional security." He praised the team behind the difficult mission. Iraqi courts will now interrogate and take legal action against the detainees. The transfer was pushed by security concerns after Syrian troops moved in northern Syria last month, raising fears of a prison breakout. Iraq has asked other countries to repatriate their citizens among the detainees, but few have done so. The SDF also asked governments to take back their nationals, mostly women and children held in camps like al-Hol. This camp, opened in 2019 after ISIL’s defeat, gained a "notorious reputation," Al Jazeera’s Assad Beig said, noting records of killings and underground ISIL groups there. The camp was largely left after the SDF withdrew from northeast Syria recently.