Fathi ben Awn ben Jildi Murad al-Tunisi (Arabic: فتحي بن عون بن الجليدي مراد التونسي‎), better known by the nom de guerre Abu Sayyaf (Arabic: أبو سيّاف‎), was reportedly a high level commander of the Islamic State of Iraq and the Levant (ISIL, Islamic State, ISIS) who had a senior role in overseeing the gas and oil operations that have been a key source of the group's revenue.American sources say Abu Sayyaf, reportedly a Tunisian, was killed on the night of May 15–16, 2015 while resisting capture during a United States Army Delta Force operation in eastern Syria.