Turkey's Interior Minister Süleyman Soylu announces that his country will begin repatriating ISIL prisoners on Monday.
A rocket fired from ISIL-controlled territory in Syria's Aleppo Governorate, kills at least one person and injures another in the Turkish city of Kilis, close to the Syria–Turkey border. The Turkish military responded with artillery fire on ISIL positions.
Hacktivist collective Anonymous declares a cyber-war on Turkey, and claims responsibility for the major week-long cyber-attack between 14 and 21 December on Turkey, which it accuses of supporting the jihadist Islamic State of Iraq and the Levant (ISIL), and threatened additional attacks in case the alleged support continues. “We will continue attacking your internet, your root DNS, your banks and take your government sites down,” it said. “After the root DNS, we will start to hit your airports, military assets and private state connections. We will destroy your critical banking infrastructure,” the group added.
The Government of Iraq calls on Turkey to withdraw its troops from northern Iraq, near the Islamic State-controlled city of Mosul. Iraq's Foreign Ministry said Turkish forces had entered Iraqi territory without the knowledge of the central government in Baghdad.
After more than 18 months of requests, Turkey comes under heavy international pressure to secure its borders to the influx of foreign fighters, oil, and weapons crossing into Syria to fight for ISIS. ISIS fighters have been moving towards the Turkey-Syria border using armored cars looted from Iraqi military bases.