(NEWSER– The State Department has ordered many embassies in the Middle East and elsewhere to close on Sunday in response to a terror threat. A State Department spokeswoman said the closings come out of an "abundance of caution," but warned that they could stretch on for days "depending on our analysis." Security officials tell NBC News that the threat appears to be tied to Ramadan, while others tell the New York Times an al-Qaeda affiliate is at the root of the threat. Sunday is a typical workday in the Muslim world, following a Friday-Saturday weekend.

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