Eleven Iraqi Sunni insurgent groups have offered an immediate halt to all attacks - including those on US troops - if the United States agrees to withdraw foreign forces from Iraq in two years.
Withdrawal is the centerpiece of a set of demands from the groups, which operate north of Baghdad in the heavily Sunni Arab provinces of Salahuddin and Diyala.
Although much of the fighting has been to the west, those provinces are increasingly violent and attacks there have crippled oil and commerce routes.
The groups that made contact have largely shunned attacks on Iraqi civilians, focusing instead on the US-led coalition forces. Their offer coincides with Prime Minister Nouri al-Maliki's decision to reach out to the Sunni insurgency with a reconciliation plan that includes an amnesty for fighters.
The Islamic Army in Iraq, Muhammad Army and the Mujahedeen Shura Council - the umbrella group that covers eight militant groups including al-Qaeda in Iraq - were not party to any offers to the government.
Naseer al-Ani, a Sunni Arab politician and official with the largest Sunni political group, the Iraqi Islamic Party, said that Mr al-Maliki should encourage the process by guaranteeing security for those making the offer and not immediately reject their demands.
Mr al-Maliki did not issue an outright rejection of the timetable demand. But he said it was unrealistic, because he could not be certain when the Iraqi army and police would be strong enough to make a foreign presence unnecessary for Iraq's security.
In Washington, US Defence Secretary Donald Rumsfeld said that President Bush's "view has been and remains that a timetable is not something that is useful. It is a signal to the enemies that all you have to do is just wait and it's yours".
AP