The head of Libya’s National Congress on Wednesday blamed the deadly attack on the U.S. consulate in Benghazi, in which the U.S. ambassador and three others were killed, on loyalists of ousted leader Muammar Qadhafi.

“This cowardly deed is an episode in the series of evil and conspiracy against the February 17 revolution (that toppled the Qadhafi regime),” added Mohammed al-Magariaf at a press conference in Tripoli.

He called on Libyans to be united to “block attempts to harm the country’s security.”

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