Gardaí are expected to hand over a report to Minister for Justice Michael McDowell today after studying CCTV footage and press coverage of Saturday's riots in Dublin city centre.
A spokesman for the Department of Justice said Mr McDowell expected to receive a preliminary report later this evening.
Minister for Foreign Affairs Dermot Ahern
The Minister will brief the Cabinet tomorrow morning and will later make a statement to the Dáil, the spokesman said.
Gardaí arrested 42 people, 13 of whom have already been before court, on the day when rioters attacked gardaí and looted shops when protesting against the unionist "Love Ulster" parade scheduled for Saturday afternoon.
The Government is hoping to expose what it believes to be a concerted republican effort to stir up trouble on the day.
Sinn Féin has denied any part in the trouble, claiming it warned its members and supporters to stay away from the city centre on the day.
Dublin Chamber of Commerce estimates that as much as €10 million may have been lost by businesses through closures and damage as a result of Saturday's riots. Several shopfronts were smashed using paving slabs set aside for O'Connell Street's reconstruction. Shops that sustained the most damage were forced to remain closed yesterday.
While some rioters came prepared on Saturday, many were teenagers and some were as young as 12.
Rubble lying on Dublin's O'Connell as Garda lines push rioters south. Photograph: Elaine Edwards
Witnesses said many of them appeared to have joined in an unexpected eruption of mayhem.
The gardaí had no intelligence suggesting there would be trouble at the march, Assistant Garda Commissioner Al McHugh said yesterday.
He said gardaí had met the organisers of the march, Fair (Families Acting for Innocent Relatives), and were told there would be no sectarian or paramilitary banners displayed.
He said the Garda knew Republican Sinn Féin were staging protest against the parade.
But Mr McHugh said: "The intelligence that was available to us from different sources including the PSNI that no high grade marching or protesting was going to take place on the day."
Mr McHugh said most of the rioters were "non-party", and he noted that many of those arrested were under 18.
He denied that O'Connell Street should not have been used because of the building work, which provided blocks, paving stones and other forms of ammunition for missiles for rioters. He added the council had made reasonable efforts to secure the sites of work.
Northern Ireland Secretary Peter Hain said he believes Saturday's violence was a one-off event rather than a pattern for the future. He said he would not let the weekend trouble deflect him from political negotiations in Northern Ireland.
Minister for Foreign Affairs Dermot Ahern said the riots were an attempt bring the sectarian tension of the North south of the Border.
"It was a crass and deeply misguided attempt to radicalise, to drive people to the extremes. The scenes on Saturday must bolster our determination to stamp out sectarianism throughout the island," Mr Ahern said.