WASHINGTON: Recently declassified US government cables suggest Pakistan's intelligence service paid a US-designated terrorist organisation $200,000 to carry out one of the deadliest attacks against the CIA in the spy agency's history.

But a US intelligence official said the information was uncorroborated and inconsistent with what is known about the 2009 suicide bombing at Camp Chapman in Khost, Afghanistan, near the Pakistani border.

Seven CIA employees were killed when a Jordanian doctor and double agent gained access to the base after tricking the Americans into believing he would lead them to Ayman al-Zawahri, then al-Qaida's No. 2. The correspondence released by the National Security Archive at George Washington University dates to the weeks after the attack.

A January 11, 2010, document says the head of the Haqqani network, a Taliban-allied group the US considers terrorists, held two meetings with senior officials of Pakistan's Inter-Services Intelligence the month of the bombing.

"The first discussed funding for operations in Khowst province" and "funds were later provided to tribal elders in Khowst province for their support of the Haqqani network," the cable says, using an alternative spelling for the area. At the second meeting, Pakistani intelligence officials gave "direction to the Haqqanis to expedite attack preparations and lethality in Afghanistan."

A Feb. 6, 2010, cable, which like the other was heavily redacted, is more specific. Network leader Siraj Haqqani and another individual were provided $200,000, it says, "to enable the attack on Chapman." The document refers to several individuals involved in the plot, including an Afghan border commander, "to enable a suicide mission by an unnamed Jordanian national."

The Jordanian would have been Humam al-Balawi, the supposed al-Qaida turncoat whom the CIA codenamed "Wolf." As the CIA ushered him onto its base on Dec. 30, 2009, al-Balawi detonated a suicide bomb. A Jordanian intelligence official and an Afghan driver also died, while six people were injured.

It was the most lethal attack against the CIA in the 15-year Afghanistan war.

The reports aren't authoritative. Each one states: "This is an information report, not finally evaluated intelligence."

The US intelligence official described the information as a "raw, unverified and uncorroborated report" that clashes with the general consensus of the attack as primarily an al-Qaida plot, and not one that involved the Haqqani network. The official spoke on condition of anonymity because he wasn't authorized to speak publicly on the matter.

Pakistan's embassy in Washington had no immediate comment on the cables.

The US has long cited the links between the Pakistani intelligence and the Haqqanis, a group that includes criminal and insurgency elements, and which uses Pakistani territory as a rear operating base. When Adm. Mike Mullen stepped down as chairman of the Joint Chiefs of Staff more than three years ago, he went as far as to call the network a "veritable arm" ofPakistan's ISI.

No evidence of Pakistani funding of the group for the Camp Chapman attack had previously surfaced publicly. The source of the information on both cables is unclear. The National Security Archive received the documents after a Freedom of Information Act request.