
Annual Sleeper Cell Report 2021 – Sleeper Cell Attacks Decreased but Security Forces Remained Weary
News, Report, Sleeper Cells
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The attack on Sina’a prison in Heseke at the end of January 2022 proved an explosive bookend to 2021, a year that had seen a decline in sleeper cell attacks in Northeast Syria (NES). Though ISIS activity in general stayed…

Sleeper Cell: Attacks on the Rise Again in November
News, Report, Sleeper Cells
Weapons cache recovered from an ISIS cell planning to attack al-Sina'a prison
Key Points
– 22 attacks documented, 14 claimed by ISIS
– The attacks resulted in 23 deaths (14 civilians, at least 9 SDF/Asayish)
– 5 murders…

Sleeper Cell Report: Attacks concentrate exclusively in Deir ez-Zor in October
News, Report, Sleeper Cells
Opening ceremony for the Women's Asayish General Center in Deir ez-Zor on October 11, 2021
Key Points
– 13 sleeper cell attacks documented, 9 confirmed ISIS attacks
– The attacks resulted in 8 deaths, including assassinations of…

Sleeper Cell Report: ISIS begins to claim more attacks amidst steady drumbeat of raids and arrests
News, Report, Sleeper Cells
SDF and HAT troops in Deir ez-Zor
Key Points
– 13 sleeper cell attacks documented, 6 claimed by ISIS
– The attacks resulted in 11 deaths, including assassinations of SDF, Asayish and AANES members
– 4 people died in Al-Hol…

Sleeper Cell Report: Number of attacks stays steady as SDF raids increase in August
News, Report, Sleeper Cells
SDF Counter-Terrorism Units on their way to conduct a security operation with support from the international coalition in Deir ez-Zor’s northern countryside.
Key Points
– 12 sleeper cell attacks documented, the same as July
–…

Sleeper-Cell Report: Record Low of Attacks in July
News, Report, Sleeper Cells
The secret ISIS cell lair was targeted with missiles from Coalition aircraft during an SDF raid in the countryside of Heseke
Key Points
- [UPDATE 9/17/21] 14 sleeper cell attacks were documented, marking a record low since RIC reporting…

Sleeper Cell Report: Attacks Decrease in Deir ez-Zor Due to Successful Raids, ISIS Activity Across NES Remains High
News, Report, Sleeper Cells
Key Points
- 25 sleeper cell attacks were reported in June across NES, significantly less than the previous month (42 attacks in May)
- 15 of these attacks were claimed by ISIS
- 19 deaths were caused by sleeper cell attacks, and at…

Sleeper-Cell Report: Attacks Remain High in May, Targeting Armed Forces and Civilians, Especially in Deir ez-Zor
News, Report, Sleeper Cells
Arrests carried out by HAT (Asayish special forces) in response to an IED attack on a military vehicle in Kibar, Deir ez-Zor
Key Points
May 2021 has seen 42 sleeper cell attacks across North and East Syria, a slight rise as compared to…

Sleeper-Cell Report: Number of attacks increase but are less deadly, only one killing in Hol Camp
News, Report, Sleeper Cells
An ISIS attack east of Raqqa led to the death of female Asayish officer Siham al-Shanan
Key facts
During the month of April, 40 sleeper cell attacks happened across North and East Syria. This represents a significant rise in attacks as…

Sleeper-Cell Report: Major operation in Hol Camp leads to high number of arrests
News, Report, Sleeper Cells
Key Facts
In general, the number of attacks and raids saw no significant change between February and March, with 27 attacks and 15 raids in March, and 28 attacks and 16 raids in February.Sleeper-cell attacks claimed 33 lives in March,…