There were Unionist claims this morning that fresh evidence has emerged linking the IRA to the break in at the Castlereagh Special Branch offices last March.
Republicans deny involvement in the March 17th raid, saying British security elements were responsible.
It is claimed that the forensic evidence was obtained as part of the huge investigation into the theft of informants' files from the Castlereagh station.
Detectives have examined fibres, which are thought to be linked to what happened in the room where three intruders overpowered an officer and seized the highly sensitive documents.
Details were confirmed as the Director of Public Prosecutions considered a police file seeking the extradition a former chef at the Castlereagh complex, who is now in the United States.
Ulster Unionist Party leader Mr David Trimble said forensic evidence that was believed to link a former chef to the St Patrick's Day raid in east Belfast supported claims that republicans were involved.
He was speaking as three Irish citizens - Mr Niall Connolly, Mr James Monaghan and Mr Martin McAuley - were due to appear in a Colombian court accused of training left-wing rebels. The two issues have intensified pressure on the Republican movement from unionists.
"I hope we will see the whole truth of this come out just as we want to see the whole truth come out on Colombia," he said.
Leading anti-Agreement Ulster Unionists Mr Jeffrey Donaldson and Mr David Burnside will meet the Chief Constable Hugh Orde to discuss the latest disclosure about the Castlereagh raid.
A book containing the names and telephone numbers of Special Branch officers was seized from the offices in the raid, which was one of the biggest security breaches in the UK.
PA