Targets include Abu Sulayman al-Adani, identified as the overall leader of the growing ISIL operation in Yemen
The United States and six Gulf states announced sanctions on top ISIL and Al-Qaeda figures in Yemen on Wednesday in the first joint action under the US- and Saudi-led Terrorist Financing Targeting Center.
The sanctions' targets include Abu Sulayman al-Adani, identified as the overall leader of the growing ISIL operation in Yemen.
It also included the ISIL 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.
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 ISIL group and Al-Qaeda on the Arabian Peninsula.
"This bold and innovative multilateral approach is needed because terrorism poses a threat to all of our nations. It is critical that we come together to combat this," US Treasury Secretary Steven Mnuchin said in a speech in Riyadh.
"We coordinated this action with the Kingdom of Saudi Arabia, the United Arab Emirates, Kuwait, Oman, Bahrain, and Qatar, who designated these advocates of terror under their own domestic authorities. This is the largest ever multilateral designation in the Middle East."
The TFTC was announced on May 21 as a joint effort to pursue the financial resources of officially designated "terror" groups across the region.
Officials see the ISIL group as spreading its influence and operations as US-backed military operations eliminate its bases in Syria and Iraq.