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FBI agents keep out of Benghazi

In a statement from the Office of the Director of National Intelligence, officials said they are revising their initial assessment of the attack in Benghazi to reflect new information indicating that it was a "deliberate and organized terrorist attack carried out by extremists." NBC's Pete Williams reports.

For security reasons, FBI agents are staying away from the Libyan city where a U.S. ambassador and three other Americans were killed, two law enforcement officials said Friday.

The officials say the bureau is not going to put agents in harm's way and that the city of Benghazi must be made secure before the FBI sends investigators there.

The officials demanded anonymity because they are not authorized to speak on the record about an ongoing investigation.

FBI agents were sent to Libya last week to look into the Sept. 11 attack that killed Ambassador Chris Stevens, a State Department computer expert and two former U.S. Navy Seals.

Terrorist groups in Libya tried to coalesce in month leading to consulate attack, officials say

At FBI headquarters Friday, spokesman Paul Bresson said "we are moving forward with our investigation," but Bresson declined to comment on the specific location of the agents.

Several questions still remain as to why top U.S. officials offered the wrong initial assessment of the Benghazi attacks that killed four Americans. Was there a cover-up? Or were they trying to avoid acknowledging mistakes so close to the presidential election? The Obama administration has denied any wrongdoing. NBC's Andrea Mitchell reports.

Separately, the State Department is further reducing the U.S. Embassy staff in Tripoli for security reasons. The embassy warned Americans of possible demonstrations in the capital and Benghazi on Friday.

On Thursday, Libya's leader said his government had disbanded about 10 militia groups and will continue to take action against Muslim extremists.

President Mohammed el-Megarif said the attack on the U.S. Consulate earlier this month that killed the four Americans was a final straw. He did not say when the militias were disbanded, or how many remain.

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