Former US secretary of state asks why CIA failed to warn him over Iraqi defector who has admitted fabricating WMD evidence

Colin Powell, the US secretary of state at the time of the Iraq invasion, has called on the CIA and Pentagon to explain why they failed to alert him to the unreliability of a key source behind claims of Saddam Hussein's bio-weapons capability.

Responding to the Guardian's revelation that the source, Rafid Ahmed Alwan al-Janabi or "Curveball" as his US and German handlers called him, admitted fabricating evidence of Iraq's secret biological weapons programme, Powell said that questions should be put to the US agencies involved in compiling the case for war.

In particular he singled out the CIA and the Defence Intelligence Agency the Pentagon's military intelligence arm. Janabi, an Iraqi defector, was used as the primary source by the Bush administration to justify invading Iraq in March 2003. Doubts about his credibility circulated before the war and have been confirmed by his admission this week that he lied.

Powell said that the CIA and DIA should face questions about why they failed to sound the alarm about Janabi. He demanded to know why it had not been made clear to him that Curveball was totally unreliable before false information was put into the key intelligence assessment, or NIE, put before Congress, into the president's state of the union address two months before the war and into his own speech to the UN.

"It has been known for several years that the source called Curveball was totally unreliable," he told the Guardian . "The question should be put to the CIA and the DIA as to why this wasn't known before the false information was put into the NIE sent to Congress, the president's state of the union address and my 5 February presentation to the UN."

Colin Powell demands answers over Curveball's WMD lies | World news | The Guardian