The United States and six Gulf states today announced sanctions on top Islamic State and Al-Qaeda figures in Yemen. The sanctions' targets include Abu Sulayman al-Adani, identified as the overall leader of the growing Islamic State operation in Yemen.<br/><br/>It also included the IS group's alleged assassinations chief, Radwan Muhammad Husayn Ali Qanan, and its main financier, Sayf Abdulrab Salem al-Hayashi, who owns a chain of supermarkets.<br/>' <br/>US Treasury Secretary Steven Mnuchin said in a speech in Riyadh that the move aims to freeze the assets across the Gulf and in US jurisdiction of 11 individuals and two entities which the countries say are key to the Yemen operations of the Islamic State group and Al-Qaeda in the Arabian Peninsula.<br/>'<br/>