U.S. Consulates and Embassies on High Alert
Move is in response to raids on diplomatic missions in Egypt, Libya, and Yemen
US missions are on high alert across the Muslim world as anger grows over a film made in the US that mocks Islam.
More anti-American demonstrations are expected after prayers on Friday. In the Egyptian capital, Cairo, police have fired tear gas at about 500 protesters near the US embassy.
On Tuesday, protesters stormed the US consulate in Benghazi in Libya, killing the ambassador and three others.