Former SDLP leader John Hume has said he believes the Taoiseach's agreement that the Provisional IRA was behind last month's £26.5m (€37.8m) bank heist in Belfast.
Mr Hume said Bertie Ahern had worked hard for the peace process and would not have pointed the finger at the IRA without clear information after Northern Ireland Chief Constable Hugh Orde said he believed the Provisionals were behind the raid.
The Nobel Peace Prize winner also said the IRA's denial of involvement could not be trusted because past statements by the organisation had not always been true.
However, Mr Hume also called on the Irish and British authorities to release evidence to back up their accusations.
He said he accepted that some information may be so sensitive it cannot be revealed, but that the two governments should release as much detail as they could and allow the public to make up its own mind on the matter.