SANAA, Yemen (AP) -- Security forces have closed roads, put up extra blast walls and increased patrols near some of the 22 U.S. diplomatic missions in the Muslim world that Washington has ordered closed for the weekend following warnings of a possible al-Qaida attack.
The closures came with a call for Americans abroad to take extra precautions throughout August, particularly when using planes, trains and boats.
In recent days, U.S. officials have said they have received significant and detailed intelligence suggesting a possible attack, with some clues pointing to the al-Qaida terror network. The State Department said the potential for terrorism was particularly acute in the Middle East and North Africa, with a possible attack occurring on or coming from the Arabian Peninsula.
The State Department says some of the missions might remain closed beyond today.