Pentagon has said, a US airstrike has killed one of Islamic State's most senior leaders, Wa'il Adil Hasan Salman al-Fayad, in Syria. Also known as Dr Wa'il, he was minister of information for IS, and oversaw the production of propaganda videos showing executions. <br/><br/>The Pentagon said, the strike had taken place near Raqqa on the 7th of this month.<br/><br/>Fayad was a close associate of IS strategist Abu Muhammad al-Adnani, who was killed in an air strike last month.