The Irish Anti War Movement has called on the Government to state its position on a war in Iraq as conflict becomes increasingly likely this week.
Mr Richard Boyd Barrett, chair of the Irish Anti War Movement said: "Bush has failed to bully the UN into sanctioning a war on Iraq.
"The Azores [summit] was a charade to try and give a semblance of legitimacy to this immoral war... In reality Bush and Blair have convinced nobody. The war they are about to start is without a shred of legitimacy and is opposed by the vast majority of people in the world."
He added: "If our government continues to allow the US military to use Shannon they will be collaborating in those plans for mass murder and flouting the legality they claim to hold so dear."
The Government last night insisted that it would not recall the Dáil in advance of any attack by the US and Britain on Iraq.
Opposition parties insisted that the Dáil should be recalled immediately, but a Government spokeswoman said there were no such plans, adding that the Cabinet meeting scheduled for Wednesday had not been brought forward.
The Government was waiting to assess the outcome of today's UN Security Council meeting, she said.
The Taoiseach, Mr Ahern, has already given an indication that the Government may allow the US military to use Shannon Airport even if it attacked Iraq without the support of the UN Security Council.
However, the Cabinet is expected to meet to finalise its position before any debate in the Dáil. With the Dáil not scheduled to sit again until tomorrow week, an emergency meeting of the Cabinet before then is likely to be held if war begins.
Fine Gael, Labour and the Greens all said the Dáil should be recalled before any hostilities.