The United Nations has warned that the number of foreign fighters operating inside Syria is growing, and that there is growing evidence that they are responsible for war crimes, and crimes against humanity. Brazilian diplomat and professor Paulo Sergio Pinheiro said:
"Despite indications that the FSA had adopted a code of ethics, media reported that 21 government soldiers were summarily executed in Aleppo...they also allegedly used prisoners to detonate vehicle borne explosives and acted, in such a way, that resulted in captives deaths. "
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