The U.S. Treasury Department, in coordination with Qatar, imposes sanctions on United Arab Emirates real estate company Aldar Properties and seven residents of Bahrain, Qatar and Saudi Arabia for allegedly financing Hezbollah.
Qatar's Interior Ministry releases a list of individuals and entities it says are linked to terrorism. Bahrain, Saudi Arabia, the United Arab Emirates, and Egypt, who had demanded the list amid tensions with Qatar, welcome its release but criticise the time taken to prepare it.
Bahrain, Egypt, Libya, the Maldives, Saudi Arabia, the United Arab Emirates, and the internationally recognized government of Yemen sever diplomatic ties with Qatar, ordering Qatari citizens in those countries to be expelled as well as cutting all land, air and sea connections. "National security," "media incitement" and Qatar's support of Iran are variously cited.
The Gulf Cooperation Council formally designates Lebanon's Hezbollah militia a terrorist organization. The GCC member states are Bahrain, Kuwait, Oman, Qatar, Saudi Arabia, and the United Arab Emirates.
Saudi Arabia announces the formation of a 34-member Islamic Military Alliance against terrorism including Egypt, Qatar, the United Arab Emirates, Turkey, Malaysia and Pakistan with a joint operations centre based in Riyadh.