The majority of U.S. embassies and consulates, which were closed in North Africa and the Middle East after warnings of a terror threat, are to reopen on Sunday.
The only one staying shut is in Sanaa in Yemen. The area is seen as a potential target for terrorist attacks from al-Qaeda in the Arabian Peninsula.
The U.S. shut 19 of its posts last week after it said it had gained significant information through surveillance.
The U.S. government also warned its citizens to avoid travelling to Pakistan, and some American diplomats were evacuated from Yemen.