The suicide bomber who killed eight people inside a CIA base in eastern Afghanistan last week was a Jordanian doctor recruited by Jordanian intelligence, a former senior U.S. intelligence official and a foreign government official confirmed Monday.

The bombing killed seven CIA employees_ four officers and three contracted security guards_ and a Jordanian intelligence officer, Ali bin Zaid, according to a second former U.S. intelligence official. The officials spoke on condition of anonymity because they were not authorized to discuss the incident.

The former senior intelligence official and the foreign official said the bomber was Humam Khalil Abu-Mulal al-Balawi, a 36-year old doctor from Zarqa, Jordan. NBC News first reported the bomber's identity.

He was arrested more than a year ago by Jordanian intelligence and was thought to have been persuaded to support U.S. and Jordanian efforts against al-Qaida, according to the NBC report. He was invited to Camp Chapman, a tightly secured CIA forward base in Khost province on the fractious Afghan-Pakistan frontier, because he was offering urgent information to track down Ayman al-Zawahiri, Osama bin Laden's right-hand man.

Hajj Yacoub, a self-proclaimed spokesman for the Taliban in Pakistan, identified the bomber on Muslim militant Web sites as Hammam Khalil Mohammed, also known as Abu-Dujana al-Khurasani. There was no independent confirmation of Yacoub's statement.

Al-Balawi was not searched for bombs when he got onto Camp Chapman, according to both former officials and a current intelligence official.

He detonated the explosive shortly after his debriefing began, according to one of the former intelligence officials. In addition to the eight dead, there were at least six wounded, according to the CIA.

The former senior intelligence official said one of the big unanswered questions is why so many people were present for the debriefing _ the interview of the source _ when the explosive was detonated.

A half-dozen former CIA officers told The Associated Press that in most cases, only one or two agency officers would typically meet with a possible informant along with an interpreter. Such small meetings would normally be used to limit the danger and the possible exposure of the identities of both officers and informants.

An online jihadist magazine in September 2009 posted an interview with al-Balawi, according to SITE Monitoring Service, a terrorist watch group that reads and translates messages on extremist forums.