Security forces in several Muslim countries are gearing up for a day of fresh protests against an anti-Islam film made in the US.
In Pakistan, the government has declared a "special day of love" for the Prophet Muhammad.
Washington has paid for adverts on Pakistani TV that show President Barack Obama condemning the film.
Widespread unrest over the amateur film, Innocence of Muslims, has already claimed several lives around the world.
Although the US has borne the brunt of protests, anti-Western sentiment has been stoked further by caricatures of the Prophet Muhammad published in a satirical French magazine.