The wreckage of burned cars sits outside the main gate of the U.S. consulate in Benghazi on the eve of the anniversary of the Sept. 11, 2012 attacks that left four Americans dead. (Abdullah Doma/AFP/Getty Images)
(WXIA) -- Security officials say an explosion caused serious damage to the Foreign Ministry building in Benghazi Wednesday morning.
The blast comes on the one-year anniversary of the al-Qaida-linked attack on the American consulate, during which U.S. Ambassador Chris Stevens and three other Americans were killed.
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It's still unclear whether Wednesday's explosion is linked in any way to that attack.
The morning blast also damaged the building next door housing the Benghazi branch of the Libyan Central Bank, and blew out windows in nearby buildings.
Several passers-by were slightly injured, according to officials speaking on the condition of anonymity.
(The Associated Press contributed to this report.)