Three protesters were injured -- one critically -- when police fired on a demonstration outside the U.S. Embassy in the Yemeni captal of Sanaa, protesters and eyewitnesses said Thursday. Anti-American sentiment has been rising in the region over the online release of a film trailer produced in the United States that denigrates Prophet Mohammed.

Yemen's president apologized to President Obama and the United States for the attack Thursday on the U.S. Embassy in the Yemeni capital, Sanaa.