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Insurgents captured in Fallujah have told Iraqi military interrogators that most of those fighting in Fallujah were former security officers for the regime of Saddam Hussein.

The insurgents said Saddam organized special operations units, starting in 2001, to counter any foreign invasion in Iraq. Most of those units, the insurgents said, are still active in the Sunni Triangle.

Officials said the Sunni insurgency was being directed from Syria. They said Saddam loyalists were receiving funding and orders from senior aides of the former Saddam regime based in Damascus, including ex-Vice President Izzet Ibrahim Al Douri.