Police in Egypt and Yemen fired tear gas at protesters near U.S. embassies as angry protests against a movie mocking the Prophet Mohammed raged for a fourth day.

Officials throughout the Muslim world were braced for violent eruptions following Friday prayers, as police and clerics appear to have tried to calm emotions.

In Cairo, many protesters took the streets near the U.S. embassy and more were expected to gather in Tahrir Square following Friday’s prayers. Police are lined up on the far side of the square, guarding the road that leads to the U.S. Embassy.

The Muslim Brotherhood had announced that it has canceled their nationwide protests. The group had previously had called for peaceful protests after Friday prayers in front of Mosques in all cities across Egypt “in response to the insults to the religious beliefs and the Prophet.”

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