Anti-American protesters, government forces clash in Egypt, Yemen

Four protesters are killed in Sana, Yemen, during an attack on the U.S. Embassy. In Cairo, police push back young men approaching the embassy there.

CAIRO — Scenes of violence played out in Cairo and Sana, Yemen, on Thursday as young demonstrators battled government security forces in anti-American protests over an online video made in the United States that mocks the Muslim prophet Muhammad.

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