More than �26m was stolen from the Northern Bank

The commission, which monitors paramilitary activity, met the Chief Constable Hugh Orde last week.

It is expected its report will endorse the police assessment that the IRA carried out the �26.5m robbery.

Mr Orde has blamed the IRA for the 20 December raid, a view also backed by the Gardai. The IRA has denied this.

Last week, the taoiseach held his first face-to-face meeting with Sinn Fein President Gerry Adams since the chief constable's assessment.

Speaking after those talks, Mr Ahern said he believed garda intelligence which suggested the IRA was responsible for the raid.

Prime Minister Tony Blair said he accepted the chief constable's view that the IRA was behind the raid.

Mr Blair met Gerry Adams and Martin McGuinness at Chequers where he reiterated his demand that all IRA paramilitary and criminal activity must end if Sinn Fein are to be part of an inclusive political process.