FBI seeks public's help on Benghazi attack

The FBI has launched an international publicity effort asking for tips from anyone with knowledge about the September 11 attack on the U.S. diplomatic mission in Benghazi, Libya, that killed four Americans.

The FBI is using the Internet and the social networking site Facebook to solicit help on the case. Last week, the FBI posted "Seeking Information" notices in English, Arabic and French with pictures of the damaged consulate.

The posters say the FBI is "asking Libyans and people around the world for additional information related to the attacks." Respondents can text or email the FBI or fill out a form on the FBI's website. The FBI notice says the information can be submitted confidentially.

Anyone can offer information, but the FBI is most interested in hearing from people who were in Libya at the time of the attack. "It is geographically logical that those in the Benghazi region who were in-country during that time period may have been in a more favorable position to have seen or heard something of value," said a law enforcement official.

The effort comes more than two months after the assault that killed Ambassador Christopher Stevens and three other Americans.

The FBI immediately launched an investigation to determine who was responsible, but officials have provided little information about its progress. Due to the uncertain security situation in Benghazi, FBI agents did not visit the consulate until October 4, and it is unclear what forensic clues were still available to be gathered by then. Reporters and others had already been to the site.

The law enforcement official said the FBI still has personnel in Libya but would not provide details about their specific locations or what progress they are making.