Four U.S officials were killed in Libya a day after protesters destroyed the American flag in Cairo.

The U.S. Ambassador to Libya has been reportedly killed in an attack by militiamen on the US consulate in the eastern city of Benghazi.

Ambassador Christopher Stevens was said to be among four U.S officials killed when armed protesters stormed the American consulate, shooting at the building and throwing homemade bombs

The protesters were protesting a Youtube video which allegedly depicts Prophet Muhammed in bad light. The video was produced by a 52-year-old Israeli America, Sam Bacile, and has only been partly released online.

Already, the U.S. State department has confirmed the death of one official from the attack, but declined to name the official.

Secretary of State, Hilary Clinton, condemned the attack saying there was no justification for it.

“We are heartbroken by this terrible loss. Some have sought to justify this vicious behaviour as a response to inflammatory material posted on the Internet,” she said in a statement.

“The United States deplores any intentional effort to denigrate the religious beliefs of others. But let me be clear: There is never any justification for violent acts of this kind,” Mrs. Clinton added.

The Benghazi attack occurs 24 hours after protesters stormed the U.S. embassy in Cairo destroying the American flag.  The Egyptian protesters were also protesting the You tube video.

Bodies of the four American are now at Benghazi airport to be air lifted back to America, a source told CNN.

U.S. president, Barack Obaama, condemned the “outrageous attack” in Benghazi.

More details later…