A protester reacts as the US Consulate in Benghazi is seen in flames during a protest by an armed group said to have been protesting a film being produced in the United States September 11, 2012. The US ambassador to Libya is among four Americans killed in an attack on the consulate, President Barack Obama has confirmed.Armed gunmen attacked the compound on Tuesday evening, clashing with Libyan security forces before the latter withdrew as they came under heavy fire. (Photo: REUTERS/Esam Al-Fetori) 

A protester reacts as the US Consulate in Benghazi is seen in flames during a protest by an armed group said to have been protesting a film being produced in the United States September 11, 2012.

The US ambassador to Libya is among four Americans killed in an attack on the consulate, President Barack Obama has confirmed.

Armed gunmen attacked the compound on Tuesday evening, clashing with Libyan security forces before the latter withdrew as they came under heavy fire. (Photo: REUTERS/Esam Al-Fetori)