They literally had over a week to surrender and be bussed out to idlib like the other rebels in gouta and refused. Terrorists who negotiated with Russia on surrender were murdered by their rebel leaders. They were warned the city would be taken by force. Assad would have just nerve gassed them 10 days ago if he wanted them wiped off the map. This attack was clearly by rebels and is another false flag. This amid reports that Russia just this week said they were planning a chem attack to blame on assad AND reports that JaI exectuted all prisoners just prior to this offensive. It looks like these videos are just executed prisoners and people dead from suffocation via being trapped in collapsed buildings from bombs (according to the syrian observatory for human rights-a british anti syrian government organization.