Twenty U.S. diplomatic facilities in the Muslim world remain closed this week following a unspecified threat from al-Qaida and its affiliates.
Embassies in the Middle East, Africa, and Asia – from Madagascar to Bangladesh to Oman to Sudan – were shuttered on Aug. 5 and will remain closed through Saturday. Emergency services will still be available to locally based U.S. citizens.
Warnings posted on embassy websites cites information the State Department collected that indicates there could be an attack during that time.
The department also issued a worldwide travel warning on Friday.
"The Department of State alerts U.S. citizens to the continued potential for terrorist attacks, particularly in the Middle East and North Africa, and possibly occurring in or emanating from the Arabian Peninsula," the warning states. "Current information suggests that al-Qaida and affiliated organizations continue to plan terrorist attacks both in the region and beyond, and that they may focus efforts to conduct attacks in the period between now and the end of August."
Al-Qaida in the Arabian Peninsula remains on of the United States' main concerns among overseas terrorist organizations.
Secretary of State John Kerry was scheduled to meet on Monday with Army Gen. Martin Dempsey, chairman of the Joint Chiefs of Staff, in a closed-door meeting.
Dempsey told ABC News' Martha Raddatz on Sunday that U.S. intelligence agencies uncovered a "significant threat stream" against the U.S. and its allies.
"The intent is to attack Western, not just U.S. interests," he said.
Al-Jazeera reports the British and German embassies in Yemen have also closed. Yemen, in turn, is stepping up domestic security forces around the British, French, German and U.S. embassies there.
National Security Adviser Susan Rice held a meeting with top intelligence and security officials on Saturday, including the leaders of the FBI, CIA, the secretaries of Defense and State and top advisers to the president, among others.
Embassy security has been a high profile point of discussion in foreign policy circles following the attack on the diplomatic compound at Benghazi last September. A unit of 500 Marines remains stationed in Spain and Italy to serve as a quick reaction force to a similar kind of attack.
Diplomatic offices will remain closed through Saturday in the following locations: Manama, Bahrain; Dhaka, Bangladesh; Bujumbura, Burundi; Djibouti, Djibouti; Cairo, Egypt; Amman, Jordan; Kuwait City, Kuwait; Tripoli, Libya; Antananarivo, Madagascar; Port Louis, Mauritius; Muscat, Oman; Doha, Qatar; Kigali, Rwanda; Dhahran, Saudi Arabia; Jeddah, Saudi Arabia; Riyadh, Saudi Arabia; Khartoum, Sudan; Abu Dhabi, United Arab Emirates; Dubai, United Arab Emirates and Sana'a, Yemen.