In March 2012 , the Secretary-General on the United Nations Support Mission in Libya reported that : On 11 September 2012 , 4 Americans , including visiting United States Ambassador to Libya J. Christopher Stevens , were killed when the U.S. diplomatic mission in Benghazi came under attack . U.S. officials said heavily armed extremists had laid siege to the consulate using " military-style tactics " . On 21 September , thousands of demonstrators , along with government police officers , stormed the bases of several Islamist militias in Benghazi , including Ansar al-Sharia , which has been linked to the attack on the U.S. consulate , and forced their members to flee
came under attack
2012 Benghazi attack
Aftermath of the 2011 Libyan Civil War