(Reuters) U.S. intelligence efforts in Libya have suffered a significant setback due to the abandonment and exposure of a facility in Benghazi, Libya identified by a newspaper as a “CIA base” following a congressional hearing this week, according to U.S. government sources.

The intelligence post, located 1.2 miles from the U.S. mission that was targeted by militants in a September 11 attack, was evacuated of Americans after the assault that killed Ambassador Christopher Stevens. Three other Americans died in the attacks on U.S.-occupied buildings, including two who were hit in a mortar blast at the secret compound.

The publication of satellite photos showing the site’s location and layout have made it difficult, if not impossible, for intelligence agencies to reoccupy the site, according to government sources, speaking on condition of anonymity.

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