Israel was a "full partner" in American and British intelligence failures that exaggerated former president Saddam Hussein's nuclear, chemical and biological weapons programs before the US-led invasion of Iraq, a report by an Israeli military research centre has alleged.

"The failures of this war indicate weaknesses and inherent flaws within Israeli intelligence and among Israeli decision-makers," Brigadier-General Shlomo Brom wrote in an analysis for Tel Aviv University's Jaffee Centre for Strategic Studies.

Israeli intelligence services and political leaders provided "an exaggerated assessment of Iraqi capabilities", raising "the possibility that the intelligence picture was manipulated", wrote General Brom, former deputy commander of the Israeli military's planning division.