London Telegraph 
March 23, 2013
The source said that the town of Khan al-Assal has been in government control since March 13 but – like so much of the area – has been much fought over and parts of the area change hands with relative frequency. Rebel Sunni groups with al-Qaeda sympathies have been attacking the town, where the population is predominantly Shia.
The military’s version of events is that the home-made rocket was fired at a military checkpoint situated at the entrance to the town. The immediate effects were to induce vomiting, fainting , suffocation and seizures among those in the immediate area.
A second source – a medic at the local civilian hospital – said that he personally witnessed Syrian army helping those wounded and dealing with fatalities at the scene. That Syrian soldiers were among the reported 26 deaths has not been disputed by either side.
The military source who spoke to Channel 4 News confirmed that artillery reports from the Syrian Army suggest a small rocket was fired from the vicinity of Al-Bab, a district close to Aleppo that is controlled by Jabhat al-Nusra – a jihadist group said to be linked with al-Qaeda and deemed a “terrorist organisation” by the US.
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