The U.S. government has identified "a certain number of people" believed involved in the Benghazi, Libya, attack, a senior Republican lawmaker tells CNN.
The lawmaker said government investigators have put identities to individuals seen in surveillance video of the attack last September that killed Ambassador Christopher Stevens and three other Americans.
"They know the names. That's what we haven't known. These are individuals they know now. Not just the pictures," the senior lawmaker said on Tuesday.
The lawmaker, who is familiar with the status of the investigation, could not say how many people had been identified.
Attorney General Eric Holder hinted last week at a congressional hearing that there were developments in the investigation.
The Associated Press reported on Tuesday that, according to unnamed U.S. officials, five men have been identified and that the government has enough information to justify the military grabbing them but not enough evidence to try them in civilian court.
The U.S. military has updated plans to "capture or kill" alleged perpetrators of the deadly terror attack on the American diplomatic compound in Benghazi, CNN reported last week.
A law enforcement official said there are definitely people the FBI is interested in and working to get more evidence about.
The White House said on Wednesday it was aware of the report.
"While I can't discuss the specifics of that ongoing investigation or the internal deliberations related to it, I can say what the president said on the day after those attacks, 'make no mistake, we will work with the Libyan government to bring to justice the killers who attacked our people,'" White House spokesman Jay Carney said.
The FBI also said it was aware of the report and would only note that the investigation is ongoing.
Several weeks ago, the FBI released photos of three men seen at the compound on the surveillance video.
The FBI did not identify them as suspects but one official did say the men could be possibly implicated.
But a CNN team in Benghazi has seen no evidence that the pictures are circulating among the local population and locals say the photos have not been posted or been shown on local television.