NEW YORK (CBSNewYork/AP) -- There continue to be major ramifications and new developments following the killing of the U.S. Ambassador to Libya in a Tuesday night attack in the city of Benghazi.
All U.S. embassies around the world have been put on high alert and an elite team of 50 Marines, known as FAST (Fleet Antiterrorism Security Team) whose role is to respond on short notice to terrorism threats, have been dispatched to Libya's capital, Tripoli, to guard the American embassy.
On Wednesday afternoon, high-ranking U.S. officials said there was increasing evidence and opinion that the attack that killed Ambassador Chris Stevens, 52, and three other Americans was a planned and targeted attack on the anniversary of 9/11 and not a spontaneous response to a film negatively portraying the Prophet Mohammad.
President Barack Obama delivered stern words Wednesday, saying there was "absolutely no justification for this type of senseless violence."
"The world must stand together to unequivocally reject these brutal acts," Obama added.
A mob with guns and rocket-propelled grenades stormed the building as Ambassador Stevens was trying to evacuate staff.
"We will not waver in our commitment to see that justice is done for this terrible act and make no mistake, justice will be done," President Obama said.
"How could this happen? How could this happen in a country we helped liberate, in a city we helped save from destruction?" said Secretary of State Hillary Clinton.
Speaking earlier at the State Department, Clinton said those killed had been "committed to helping the Libyan people reach for a better future.''
Earlier, Long Island Rep. Peter King expressed outraged over the "horrific, savage attack" on the U.S. consulate in Benghazi.
King, who is also the chairman of the House Committee on Homeland Security, said in a statement "that swift justice be dealt to those who perpetrated these attacks."
Three other Americans, including foreign service information management officer Sean Smith, were also killed.
"My thoughts and prayers go out to the families of Ambassador Chris Stevens, foreign service officer Sean Smith and the two others killed in the attack," King said. "They were dedicated public servants working effectively to spread freedom and nurture democracy."
The identities of the others were being withheld pending notification of next of kin.
President Obama spoke after Republican presidential challenger Mitt Romney condemned the attack and criticized the administration for its initial response to a separate incident on Tuesday, the breach of the U.S. embassy in Cairo.
In that incident a mob was protesting an obscure American-made film about Islam. The embassy released a statement condemning the movie, drawing criticism from Romney.
"Simply put, having an embassy that has been breached and has protesters on its grounds, having violated the sovereignty for the United States and having that embassy reiterate a statement effectively apologizing for the right of free speech is not the right course for an administration," Romney said.
Now, Romney is being criticized by people from both parties for the timing of his comments so soon after the Egypt attack and President Obama said Romney has a tendency to "shoot first and aim later."
Gen. Martin E. Dempsey, meanwhile, has called Florida preacher Terry Jones, who is known for inflammatory anti-Islamic rhetoric, to express his concerns about the aforementioned film critical of Islam, saying it could inflame tensions and trigger violence. Dempsey has asked Jones to withdraw his support for the film.
The protests are believed to have been touched off by an obscure movie made in the United States by a filmmaker who calls Islam a "cancer." Video excerpts posted on YouTube depict the Prophet Muhammad as a fraud, a womanizer and a madman in an overtly ridiculing way, showing him having sex and calling for massacres.
In a statement, the Muslim Peace Coalition USA said it "unequivocally condemned" the attack in Benghazi as well as attack on the U.S. embassy in Cairo, but also condemned the film.
"The makers of this film, who have willfully and deliberating [sic] incited controversy, have endangered American diplomatic personnel and troops overseas and done a gross disservice to the nation," Dr. Shaik Ubaid, New York co-chair of MPC-USA, said in the statement. "We are a nation of free speech, and it is a core value to be defended, but we should also be a nation of responsible speech and hate speech often has dire consequences."
Libya's interim president, Mohammed el-Megarif, apologized for what he called the "cowardly'' assault on the consulate, which also killed several Libyan security guards in the eastern city.
"We extend our apology to America, the American people and the whole world," el-Megarif said.
Stevens is the first U.S. ambassador to be killed in an attack since 1979, when Ambassador Adolph Dubs was killed in Afghanistan.
Stevens was a career diplomat who spoke Arabic and French and had already served two tours in Libya, including running the office in Benghazi during the revolt against Libyan leader Moammar Gadhafi. He was confirmed as ambassador to Libya by the Senate earlier this year.
Stevens joined the Foreign Service in 1991 and spent his early State Department career at posts in Saudi Arabia, Egypt, Syria and Israel. After working for the Senate Foreign Relations Committee staff for Sen. Richard Lugar, R-Ind., Stevens was posted to Libya as deputy chief of mission.
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