Violence spreads across Middle East over anti-Islam film

Crowds are expected to gather after Friday prayers. In the early morning hours, Egyptian police used tear gas to disperse protesters near the U.S. Embassy in Cairo for the fourth straight day.

Demonstrations that began earlier this week in Egypt and Libya spread to other areas, including Yemen, Iran, Iraq and Bangladesh on Thursday.

Meanwhile, Libyan officials have arrested four people in connection with this week’s assault on the U.S. consulate in Benghazi that killed U.S. Ambassador Christopher Stevens and three of his staff. The officials did not provide details.

American intelligence agencies are examining the alleged involvement of pro-al-Qaida militants. But they say they do not have solid evidence.

U.S. Secretary of State Hillary Clinton condemned the amateur U.S.-made movie that mocks the Islamic Prophet Muhammad. She called it