Protests against film spread across Muslim world

New protests erupted across the Muslim world Friday, where anger is spreading over an anti-Islamic video posted on the Internet.

Friday was the fourth day of protests over the film, which was a topic of conversation at Friday prayers across the Middle East, south and east Asia and Africa. Many demonstrators have been targeting countries they feel have not done enough to stop the video from being made.

U.S. and other foreign missions stepped up security following violent attacks that began Tuesday.

Some of the biggest demonstrations have taken place in Cairo, where protesters near the U.S. embassy Friday were met by police, who responded by firing with tear gas.

Protests have also taken place in Malaysia and Indonesia and security was tight in Kabul, Afghanistan.

In Benghazi, Libya, where the U.S. ambassador and three other American personnel were killed in an attack Tuesday, security was stepped up around the city and the airport temporarily closed.

U.S. warships are headed to the Libyan coast, while additional U.S. marine guards were deployed to protect the American embassy in Yemen, breached by protesters Thursday.

In many Cairo mosques Friday, the video, a crudely-made attempt to mock the Prophet Muhammad, was the topic of the day. One imam reminded worshippers that Egyptians, under their new, Islamist government, can now openly defend the prophet from such insults.

Egyptian President Mohamed Morsi, who has condemned the video, spoke out again Friday on the need to keep protests in check.

Egyptian security forces built a barrier Friday to block the route to the embassy. Egyptian police used tear gas earlier to break up the protests.

U.S. President Barack Obama spoke Thursday about the relationship between the U.S. and Egypt.