Hundreds of Yemeni demonstrators angered over a film mocking Islam have stormed the grounds of the U.S. Embassy in Sana'a, continuing a wave of anti-American protests sweeping the region.
The mob torched a number of diplomatic vehicles Thursday as security guards used water cannons and warning shots in a bid to drive them out of the heavily fortified compound. A number of people were reportedly injured.
The U.S. ambassador to Libya and three of his staff were killed Tuesday after suspected Islamist militants stormed the American consulate in Benghazi, during similar demonstations.
Meanwhile, protests continued outside the U.S. Embassy in the Egyptian capital, Cairo, Thursday as police used tear gas against a crowd of about 200 youth. The violence was directed against an obscure American-made amateur film mocking the Prophet Muhammad.
Video footage of protest
Egypt's Islamist President Mohamed Morsi, on an official visit to Brussels Thursday, slammed "attacks" on the Muslim prophet in the film, while also condemning the violence.
"We Egyptians reject any kind of assault or insult against our prophet. I condemn and oppose all who... insult our prophet," said Morsi.
"[But] it is our duty to protect our guests and visitors from abroad. I call on everyone to take that into consideration, not to violate Egyptian law, not to assault embassies," he added.
US, Libya cooperation
U.S. President Barack Obama and the president of Libya's National Assembly, Mohamed Magarief, agreed Wednesday to cooperate closely in investigating the deadly attack on the U.S. consulate in Benghazi. The Libyan leader has apologized to the United States for the assault.
Washington sent two Navy destroyers, a Marine Corps anti-terrorist security team and federal investigators to Libya to protect Americans and help hunt the suspected religious extremists who carried out the attack late Tuesday.
The Obama administration also ordered the evacuation of all U.S. personnel from Benghazi to the capital, Tripoli.
American officials said Wednesday the attack on the Benghazi compound and a nearby safe house may have been a planned, coordinated and complex operation, in contrast to the initial Cairo protest, which appeared to be spontaneous. They say armed militants in Libya may have used the Cairo events as cover.
But, the officials say it is too early to identify those who killed U.S. Ambassador J. Christopher Stevens and three colleagues or whether the assault was timed to coincide with the anniversary of the September 11, 2001 terrorist attacks on the United States.
American intelligence agencies are examining the alleged involvement of pro-al Qaida Ansar al-Sharia militants, but cautioned they do not have solid evidence. On Wednesday, a brigade from the group denied planning the assault.
Stevens is the first U.S. envoy to be killed on duty since 1979. He was a career foreign service officer and one of the most experienced American diplomats in the region.
The ambassador was widely admired by Libyan rebels for his support of their uprising that overthrew longtime Libyan dictator Moammar Gadhafi last year. U.S, Secretary of State Hillary Clinton said Stevens risked his life to lend the Libyan people a helping hand to build the "foundation for a new, free nation."
President Obama Wednesday condemned the killing of the four Americans as "outrageous and shocking." He also said the United States rejects all efforts to "denigrate the religious beliefs of others," a reference to the controversial film.
A trailer for the anti-Islamic video was posted on YouTube in July. An Arabic-language translation began circulating in the Middle East in recent days. Clips from the movie depict the Prophet Muhammad as a villainous, homosexual child-molesting buffoon, among other overtly insulting claims.
Photo Gallery: Anti-US Protests in Libya, Egypt
Yemeni protestors break a door of the U.S. Embassy during a protest about a film ridiculing Islam's Prophet Mohammed, Sana'a, Yemen, September 13, 2012.
Yemenis protest in front of the U.S. Embassy during a protest about a film ridiculing Islam's Prophet Mohammed, Sana'a, September 13, 2012.
Egyptian protesters burn tires as they clash with riot police outside the U.S. embassy in Cairo, Egypt, September 13, 2012.
An Egyptian protester throws back a tear gas canister toward riot police outside the U.S. embassy in Cairo, September 13, 2012.
A policeman stands in front of a police car set on fire by protesters in front of the U.S. embassy in Cairo, Egypt, during clashes between protesters and police, September 13, 2012.
White House staff are pictured after they lowered the U.S. flag to half staff on the roof of the White House in Washington, September 12, 2012, following the death of U.S. Ambassador to Libya, Chris Stevens.
President Barack Obama delivers a statement with Secretary of State Hillary Clinton from the Rose Garden of the White House in Washington, September 12, 2012
A burnt car is parked at the U.S. consulate, which was attacked and set on fire by gunmen, in Benghazi, Libya, September 12, 2012.
An exterior view of the U.S. consulate, which was attacked and set on fire by gunmen yesterday, in Benghazi September 12, 2012.
An interior view of the damage at the U.S. consulate, which was attacked and set on fire by gunmen yesterday, in Benghazi, Libya, September 12, 2012.
Christopher Stevens, the U.S. ambassador to Libya, was killed along with three of his staff on September 11, 2012 during a demonstration at the U.S. consulate in Benghazi. This photo was taken at his home in Tripoli, June 28, 2012.
A vehicle sits smoldering in flames after being set on fire inside the US consulate compound in Benghazi late on September 11, 2012.
An armed man waves his rifle as buildings and cars are engulfed in flames after being set on fire inside the U.S. consulate compound in Benghazi, Libya, late on September 11, 2012.
U.S. Consulate in Benghazi in flames during protest, September 11, 2012