Yesterday, Bellingcat published a report on the bombing of the Syrian Red Crescent aid convoy on September 19th, that examined various aspects of the attack using information from open sources.
In particular, it included the comparison of what appeared to be the tail section of a OFAB 250-270 bomb that appeared in images from the attack:
After publishing the report, the Bellingcat team has been in touch with the Syrian Civil Defence unit closest to the attacked site, who recovered and photographed two pieces of debris, including the object featured above.
In addition, an photo was published that shows the location of the debris, where also the likely entry point of the munition is shown:
The image allows accurately identify the munition debris recovered: it is coming from the tail section of a OFAB 250-270 high explosive fragmentation bomb:
OFAB 250-270s are unguided bombs of Soviet/Russian production. It was previously documented that they were used by both the Syrian and Russian air forces in their bombing campaigns in Syria. These bombs are not used by any aircraft manufactured by NATO countries, including Predator drones.
There is no question about the type of the bomb used. The only question that remains is whether it was Russian or Syrian aircraft that dropped it on the Syrian Red Crescent aid convoy.