Protesters try to storm U.S. Embassy in Yemen Bloomberg September 13, 2012, 2:20 a.m. Protesters attempted to storm the U.S. Embassy in Sana'a, Yemen two days after four people were killed in an attack on an American diplomatic mission in Libya. Yousef Al-Ahjan, a protester, said he and others managed to breach the first security perimeter. Some of the assailants set two embassy vehicles on fire. Smoke could be seen rising from the vicinity of the embassy compound and gunfire could be heard. Police have cordoned off the area near the embassy, preventing all access. Mohammed Ali, a protester who was walking away from the compound area after security forces fired into the air, said he and others were protesting an anti-Islamic video posted on YouTube. The video, which seeks to ridicule Islam's Prophet Muhammad, also sparked demonstrations in Egypt and Tunisia. Ali also said the protesters want the U.S. ambassador to Yemen expelled.