The president of Libya’s national assembly Mohammed Magarief has apologised for the killing of the US Ambassador Christopher Stevens, which has drawn widespread condemnation, including from the Muslim Brotherhood.

"We apologise to the United States, the people and to the whole world for what happened," he told a news conference broadcast live on Al Jazeera television.

US President Obama has praised the courage of the Ambassador and while condemning the attacks, noted that it was Libyans who carried the ambassador to a hospital.

"While the United States rejects efforts to denigrate the religious beliefs of others, we must all unequivocally oppose the kind of senseless violence that took the lives of these public servants," Obama said in a White House statement.

The Muslim Brotherhood in neighbouring Egypt, which also saw the US embassy attacked, condemned the release of the movie, but also the ‘disastrous’ attacks.

"It's no problem for them to protest and have their demands ... but it doesn't mean you need to (inflict) any harm on the embassy here," said Dina Zakaria, a representative of the Muslim Brotherhood.

"The ambassador in Libya, is he the one who produced the film? Is he the one who permitted the film? Of course not,"

"You are making a problem that will cause another problem and all of that is really against what we want. It will not secure what we want."

"Just because you are against something doesn't mean you have to kill. I think it's really a disaster." she said.

Ambassador Stevens was in a car evacuating the embassy compound, after Sean Smith, a foreign service information management officer was killed by the mob protesting against a film about Prophet Mohammad that was deemed blasphemous.

The crowds fired rockets at the vehicle, causing it to burst into flames. Two Marines who were seen attempting to pull out the ambassador were shot dead by the mob. The ambassador subsequently died of smoke inhalation in a nearby hospital.