The original story in Arabic talks about sources publishing online but don't provide any link or other info. Searching for the story online in Arabic only comes up with Syrian news sites and Syrian allies news sites warning against an the Islamist group; in other words the regime and its allies seem to be fear mongering against the resistance. No other credible news site is publishing the story. CNN has published that another site published the story, also no links or proof.
I don't know for sure what happened and I can't prove anything. But this seems so one sided and heavily politicized kinda like ObamaCare Death Panels.