Editor's note: Several protests stemming at least in part from an anti-Islam film produced in the United States are unfolding outside U.S. embassies around the world. Thursday's protests follow ones in Cairo and Benghazi and an attack on the U.S. Consulate in Libya on Tuesday night that killed the U.S. ambassador and three others. Follow along with the live blog below for all of the developments around the world.
[Updated at 5:18 p.m. ET] Ayatollah Ali Khamenei, Iran's supreme leader, said the U.S. government should bring to justice those behind the anti-Islam film.
Khameini on Thursday called the making of the film a "criminal act," according to the state-run Islamic Republic News Agency. His comments came the same day university students protested outside the Swiss Embassy in Tehran, blaming the United States and Israel for the American-made film. The Swiss Embassy represents U.S. interests in Iran.
[Updated at 3:59 p.m. ET] At least one person has been arrested in the killings of U.S. Ambassador to Libya Christopher Stevens and three other Americans, Libya's prime minister said Thursday.
One person was arrested early Thursday in Benghazi, Mustafa Abushagur said on CNNI's "Amanpour." "Three or four are currently being pursued," he said.
Earlier, the Libyan state-run news agency LANA said more than one person had been arrested. It cited the deputy minister of interior in the eastern region, Wanees al-Sharif, as its source.
The announcement came as the United States is struggling to determine whether a militant group planned the attack that killed the four Americans, even as warships head toward the north African country as part of a mission to hunt down and punish the killers.
[Updated at 3:11 p.m. ET] Four people were killed Thursday during protests near the U.S. Embassy in the Yemeni capital, Sanaa, according to two Yemeni security officials. They reported 11 injuries among protesters.