An internal Coalition report, citing web sources, noted claims that civilian casualties had been alleged at Slouk “on a strike on some grain silos.” The aircraft was likely to have been a US armed drone, due to the Hellfire missile used.
An initial investigation concluded that there had been no civilians injured: “The only strike that corresponded with the report was a strike on a tank about 70km N of Raqaa. Review of the aircrew’s video showed that the strike conducted with  AGM-114, struck the target. No civilians were present on the video, either pre- or post-strike… No further inquiry required.”
A search of public records by Airwars found that the location of the Coalition’s strike did appear to be Slouk. As Raialyoum reported at the time: “The strikes [which were attributed instead to October 29th]continued in the northern countryside, targeting granaries [silos] around Slouk 80km north of Raqqa city. These are believed to be used by IS as stores for heavy weapons that were captured from Brigade 80. The raid resulted in the destruction of part of the silos, and an IS tank parked nearby.”
An Islamic State propaganda video released on November 2nd 2014 alleged that civilians had died in the attack, showing the corpses of what it said were two petrol sellers. However no reference was made to grain silos.
The local time of the incident is unknown.
Sources (4) [ collapse]
US-led Coalition Assessment:
Civilian casualty statements
May 1, 2015
The only strike that corresponded was on a tank about 70 km N of Raqqah. Review of the aircrew’s video showed that the strike, conducted with AGM 114, struck the target. No civilians were present either pre- or post-strike. An internal review of a strike during the initial deliberate strikes in Syria prior to 29 September on the area IVO grain silos in Idlib had already been conducted, determined not to have been CIVCAS.
Original strike reports
COALITION-ASSESSED CASUALTY INCIDENT