The suicide bomber¹ who killed seven CIA agents in Afghanistan was an al-Qaeda triple agent, US media reports say.

美国媒体报道，阿富汗炸死七名CIA特工的自杀式袭击者是基地组织的三重间谍。

The victims have not been named in order to protect CIA operations

He is said to have been a doctor from Jordan who was arrested by Jordanian intelligence a year ago.

He was then reportedly recruited招募，雇佣 by the Jordanians and CIA - who thought they had successfully turned him - and given a mission to find al-Qaeda leaders.

He is believed to have been working undercover秘密的 in Afghanistan for weeks before detonating引爆 a bomb at a CIA base.

The attack at Forward Operating Base Chapman was the worst against US intelligence officials since the US embassy in Beirut贝鲁特 was bombed in 1983.

The news about the bomber's identity came as a report was published in which the top US military intelligence officer in Afghanistan, Maj Gen Michael Flynn, sharply criticised the work of US intelligence agencies there.

He said that at present, US intelligence in Afghanistan was still "unable to answer fundamental questions about the environment in which US and allied² forces operate and the people they are trying to protect and persuade".

The report, which was published by a think tank, the Center for a New American Security, cites one officer's remarks that the US was "clueless无线索的，愚蠢的" due to its lack of useful intelligence about the country.

Changing sides

On the suicide bomb attack, the Washington Post quoted two former US government officials as saying that the alleged³ attacker had lured引诱，诱惑 the CIA officers into a meeting with a promise of new information on al-Qaeda's top leadership.

The reports named him as Humam Khalil Abu-Mulal al-Balawi, a 36-year-old al-Qaeda sympathiser from Zarqa, Jordan, arrested by Jordanian intelligence over a year ago.

His specific mission was thought to be tracking down al-Qaeda's number two, Ayman al-Zawahiri.

The CIA has declined to拒绝 comment on the reports.

Jordanian intelligence believed they had brought Humam al-Balawi over to their side and sent him to Afghanistan to infiltrate渗入，潜入 al-Qaeda, US network NBC says.

According to Western intelligence officials quoted in the reports, Humam al-Balawi called his handlers last week to arrange a meeting at Forward Operating Base Chapman in Khost, where he said he would relay urgent information about Zawahiri.

Once inside the base, the reports say, he blew himself up killing⁶ seven CIA employees and his handler处理者，管理者, whom Jordanian media have named as Ali bin⁷ Zeid.

Questions were raised after the bomb was detonated in the base's gym last week about how the attacker could have managed to pass through security.

The Washington Post says he was picked up in a car outside the base and driven in without being thoroughly⁸ searched.

A US official, also a former CIA employee, told the Associated Press news agency that such people were often not required to go through full security checks, in order to help gain their trust.

"When you're trying to build a rapport密切关系，默契 and literally逐字地，照字面地 ask them to risk [their lives] for you, you've got a lot to do to build their trust," he said.