Incident Code

CS1813

Location

Al Soussa: Othman Bin Affan mosque, al Boubadran village, Deir Ezzor, Syria
البوبدران

Geolocation

34.542338, 40.959091
Accuracy: Village

Airwars Assessment

Last Updated: 11 August 2026

In what several sources described as “a massacre”, at least 8 and as many as 70 civilians were alleged killed in an alleged Coalition airstrike on Osman Bin Affan Mosque in the village of Al-Sousse after Friday prayers.

The incident occurred after two other reported incidents on October 18th in and around al Soussa, targeting the home of Mohammed al-Obeid al-Hattab in Al-Soussa and the Ammar bin Yasser mosque in Al Boubadran village near al Soussa. Some reports confused elements of these separate events.

The lowest death count at the Osman Bin Affan Mosque was given at 8, by Smart News. It said that bombing caused the deaths of more than 40 people, “including eight civilians”. The source went on to say that the rest of those killed were “elements of Daesh, mostly Iraqis.” It should be noted, however, that “elements of Daesh” does not specifically refer to ISIS fighters and can also include ISIS family members, which may explain why other sources put the death toll higher.

The Syrian Network for Human Rights reported that “at least 16 civilians, including five children, were killed as International Coalition forces warplanes fired missiles on Othman Bin Affan Mosque, also known as Hajji Mohammad Mosque, in al Boubadran neighborhood in al Sousa town”.

Marsad Al Hasaka put the death toll higher at 23 civilians including 3 children, of whom it said 6 were overall reportedly Syrians and the rest of Iraqi nationality. It added that 11 members of ISIS also died, noting that the airstrike hit the mosque and surrounding houses.

The majority of sources put civilian deaths in the range of between 30-46, although some sources referred to the total while others refer to the number as civilian casualties.

For example, Euphrates Post said that a total of 37 people, including a large number “members of Daesh” died, whereas Sana News said that 37 civilians were killed.
Sana’s sources stated that the death toll was likely to rise as most of the wounded sustained serious injuries and many people remained trapped under the rubble of destroyed homes.

Al Jazeera quoted German medical sources of the opposition in Deir al-Zour, stating that in total more than 35 people were killed and 60 others wounded. In addition, “the sources pointed out that a number of bodies and wounded are still under the ruins of the mosque, which was completely destroyed…”

Sound and Picture put the death toll even higher, at 46 civilians with 100 wounded. In a subsequent post, this source posted a video reportedly showing F-16 international coalition planes flying over the eastern countryside of Deir Ezzor just minutes before the airstrike.

A number of  sources, including Baladi, @saaraaa2011 and @NorsForStudies tweeted that as many as 70 civilians died in this event.

Key Information

Incident Status
Assessed
Country
Civilian Harm Reported
Yes
Civilian Harm Status
Fair
Civilians reported killed
8–70
3–5 Children, 2 Women
Civilians reported injured
12–100

Geolocation

Reports of the incident mention the village of Al Soussa: Othman Bin Affan mosque, al Boubadran village (البوبدران), for which the generic coordinates are: 34.542338, 40.959091. Due to limited satellite imagery and information available to Airwars, we were unable to verify the location further.

Military Statements

U.S.-led Coalition Assessment
Suspected belligerent
U.S.-led Coalition
U.S.-led Coalition position on incident
Not yet assessed
Civilian deaths conceded
None
Civilian injuries conceded
None
U.S.-led Coalition Strike Report
For October 18th – 19th, the Coalition reported: “Near Abu Kamal and Hajin, 10 strikes engaged 29 tactical units, and destroyed two command and control centers, one IED facility, one vehicle-borne IED facility, one mortar team headquarters, one building and two staging areas." For October 19th-20th: “Near Hajin, 10 strikes engaged 11 tactical units, and destroyed one vehicle-borne IED, one armored vehicle, three vehicles and five supply routes."
French Military Assessment
French Military Strike Report
•
Original Source↗
France report that between Oct 17th-23rd, the three CAESAR guns of Task Force Wagram conducted 17 firing missions, from Iraqi territory. Aircraft carried out 18 sorties and conducted eight strikes north of Abu Kamal in Syria.
Dutch Military Assessment
Dutch Military Strike Report
•
Original Source↗
For Oct 17th-24th, Dutch MoD reports that Dutch F-16s supported ground troops during nine missions. Weapons were deployed in six of these missions – against ISIS fighters and vehicles near Abu Kamal, Deir Ezzor.

Sources (37)

Hamah Now

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Hamah Now

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Mohammed Hassan

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Mohammed Hassan

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Nors For Studies

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Nors For Studies

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Masar Press Net

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Masar Press Net

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Shaam

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Shaam

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Madar Daily

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Madar Daily

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Eldorar

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Eldorar

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Bukamal Live

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Bukamal Live

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Free Deir Ezzor Radio

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Free Deir Ezzor Radio

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Sana News

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Sana News

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Step News Agency

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Step News Agency

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Step News Agency

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Step News Agency

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Smart News Agency

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Smart News Agency

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Sarmad Al-Jilane

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Sarmad Al-Jilane

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Syrian Network for Human Rights

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Syrian Network for Human Rights

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Syrian Observatory for Human Rights

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Syrian Observatory for Human Rights

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Sound and Picture

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Sound and Picture

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Suriye UAD

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Suriye UAD

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Zamanalwasl

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Zamanalwasl

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Euphrates Post

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Euphrates Post

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Aljazeera

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Aljazeera

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Sara K.M.

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Sara K.M.

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Nors For Studies

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Nors For Studies

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Abdoalhodaalhoms

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Abdoalhodaalhoms

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Sound and Picture

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Sound and Picture

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Sarmad Al Jilane

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Sarmad Al Jilane

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Free Deir Ezzor

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Free Deir Ezzor

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Sound and Picture

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Sound and Picture

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Bukmalna

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Bukmalna

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Syrian Network for Human Rights

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Syrian Network for Human Rights

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Syrian Network for Human Rights

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Syrian Network for Human Rights

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Al Hasaka Arabea

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Al Hasaka Arabea

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Syrian Observatory for Human Rights

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Syrian Observatory for Human Rights

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Syria Unified Observatory

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Syria Unified Observatory

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Baladi News

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Baladi News

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Souriyati

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Souriyati

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Omar Abu Layla

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Omar Abu Layla

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Media from Sources (2)