WATCH: The Republican-led House intelligence committee investigating the Benghazi attack in 2012 quietly released a report on Friday. The report concludes there was no evidence of a deliberate cover up. Susan McGinnis reports from Washington, DC.

WASHINGTON – A two-year investigation by the Republican-controlled House Intelligence Committee has found that the CIA and the military acted properly in responding to the 2012 attack on a U.S. diplomatic compound in Benghazi, Libya, and asserted no wrongdoing by Obama administration appointees.

Debunking a series of persistent allegations hinting at dark conspiracies, the investigation determined that there was no intelligence failure, no delay in sending a CIA rescue team, no missed opportunity for a military rescue, and no evidence the CIA was covertly shipping arms from Libya to Syria.

In the immediate aftermath of the attack, intelligence about who carried it out and why was contradictory, the report found. That led Susan Rice, then U.S. ambassador to the United Nations, to inaccurately assert that the attack had evolved from a protest, when in fact there had been no protest. But it was intelligence analysts, not political appointees, who made the wrong call, the committee found. The report did not conclude that Rice or any other government official acted in bad faith or intentionally misled the American people.

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The attacks in Benghazi killed U.S. Ambassador Christopher Stevens and three other Americans. A Libyan extremist, Ahmed Abu Khatalla, is facing trial on murder charges after he was captured in Libya and taken to the U.S.

After the attacks, Republicans criticized the Obama administration and its then-secretary of state, Hillary Rodham Clinton, who is expected to run for president in 2016. People in and out of government have alleged that a CIA response team was ordered to “stand down” after the State Department compound came under attack, that a military rescue was nixed, that officials intentionally downplayed the role of al-Qaida figures in the attack, and that Stevens and the CIA were involved in a secret operation to spirit weapons out of Libya and into the hands of Syrian rebels.

None of that is true, according to the House Intelligence Committee report.

The report was released with little fanfare on the Friday before the week of the Thanksgiving holiday. Many of its findings echo those of six previous investigations by various congressional committees and a State Department panel. The eighth Benghazi investigation is being carried out by a House Select Committee appointed in May.