Sleeper Cell Report: Sina’a Prison Attack Shocks Heseke While Sleeper Cell Attacks Continued Throughout NES in January

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Key Points – 38 attacks documented, 34 claimed by ISIS, including the 9 day-long Battle of Heseke – The attacks resulted in 128 civilian and SDF deaths, primarily military personnel during the Heseke Battle – 4 murders…

Annual Sleeper Cell Report 2021 – Sleeper Cell Attacks Decreased but Security Forces Remained Weary

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Download here. 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

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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

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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

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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

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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

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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

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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

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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

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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…