Protesters demonstrating against an anti-Muslim film posted on youtube stormed the U.S. Embassy in Yemen Thursday morning.
Security guards tried to hold back hundreds of demonstrators, but were over taken.
At one point, Embassy guards fired automatic weapons into the air in an effort to disperse the crowd.
The protesters were able to breach the Embassy's outer wall and get into the compound.
Once inside, they tore down the U.S. flag and burned it.
Meanwhile, security forces in Cairo, Egypt fired tear gas at rock throwing demonstrators near the U.S. Embassy there Thursday morning.
Egypt's state new agency said there were injuries in the latest round of clashes, but gave no other details.
On Tuesday, demonstrators scaled the walls of the compound and ripped down the American flag.
These demonstrators are also angry over theinternet video, that they believe is insulting to the prophet Mohammad.
The video may have also led to an attack on a U.S. Consulate in Libya that left the U.S. Ambassador and three other Americans dead.