Obama: US has 'profound respect for people of all faiths' Updated at 4:05 a.m. ET: WASHINGTON - President Barack Obama on Saturday rejected any denigration of Islam, but insisted there was no excuse for attacks on U.S. embassies as angry protests continued over an obscure, anti-Muslim film. "I have made it clear that the United States has a profound respect for people of all faiths," Obama said in his weekly radio address. Yet there is never any justification for violence .... There is no excuse for attacks on our embassies and consulates," he added. Anti-American protests have swept the Muslim world in response to the film, which insults the Prophet Muhammad. An attack on the U.S. Consulate in the Libyan city of Benghazi killed U.S. Ambassador Christopher Stevens and three others this week. A day after Obama led a somber ceremony marking the return of the bodies of the Americans killed in Libya, Obama acknowledged that a surge of anti-American violence in the Middle East is disturbing. The Pentagon is sending Marines to beef up security at the U.S. embassy in Sudan, following similar reinforcements to Libya and Yemen. The Libyan attack and the U.S.-directed outrage have raised questions about Obama's handling of the so-called Arab Spring, a series of revolutions that have unseated entrenched authoritarian governments. The turbulence in the Middle East has had ripples in a tight U.S. presidential election, with Obama's Republican challenger Mitt Romney saying Obama has weakened U.S. authority around the world. However, Obama repeated a vow to bring the attackers of the U.S. consulate in Libya to justice. "We will not waver in their pursuit," he said. The president also said the turmoil should not deter U.S. efforts to support democracy in the region or elsewhere. "Let us never forget that for every angry mob, there are millions who yearn for the freedom, and dignity, and hope that our flag represents," he said. The protests over the anti-Islam film, "Innocence of Muslims," which made in the U.S. continued Saturday, spreading to Australia where the authorities seemed taken by surprise as more than 400 demonstrators gathered outside the U.S. Consulate in Sydney. Muslim leader calls for calm Reuters Television pictures showed one policeman with a head injury being led away by colleagues. In Egypt, the interior minister said he would restore calm after a 35-year-old protester was killed and dozens of people were injured in clashes overnight. The authorities closed the street leading to the U.S. Embassy where the demonstrators had spent four days throwing rocks and petrol bombs at police. 'Disgusting' film The protesters said they wanted to expel the U.S. ambassador to punish Washington over the low-budget film. It portrayed the Prophet Muhammad as a womanizer and religious fake. Egypt's state news agency said 27 people were injured on Friday, which suggests more than 250 people have been hurt in the clashes since Tuesday, when protesters climbed the embassy's walls and tore down an American flag.