Official says the powerful explosion was caused by a car bomb -- state media . The blast hit central Benghazi on the anniversary of the attack on the US Consulate . The explosion damaged a Foreign Ministry building and a bank branch , a witness said . The blast did not cause any casualties but blew away large parts of the building 's facade , said Col. Abdullah Al Zaydi , spokesman for the Joint Security Task Force in Benghazi , according to Libya 's state news agency , LANA . The Central Bank of Libya says one of its security guards was slightly injured .
Official says the powerful explosion was caused by a car bomb -- state media . The blast hit central Benghazi on the anniversary of the attack on the US Consulate . The explosion damaged a Foreign Ministry building and a bank branch , a witness said . The Central Bank of Libya says one of its security guards was slightly injured .