Militants, meanwhile, set off three bombs in the capital Friday, killing at least one civilian and wounding eight others, officials said, the latest in a series of deadly attacks across Baghdad.
Ahmed Abdul Ghafour al-Samarrai, a cleric in the influential Sunni Association of Muslim Scholars, said during Friday prayers that Talabani should free all Iraqi detainees and refuse to "obey and kneel to pressure" from Defense Secretary Donald H. Rumsfeld.
The comments came three days after Rumsfeld visited Iraq and urged the emerging government to avoid politicizing the military and to stick to the current strategy of maintaining a U.S. presence until Iraq's own forces are capable of defeating the insurgents.
After he was sworn in as president two weeks ago, Talabani reached out to Iraqi militants and suggested they could be pardoned, although he said the government would continue to fight foreign insurgents. The U.S. military says it is holding 10,500 prisoners in Iraq.
Some lawmakers have said Talabani was just expressing his personal opinion in a largely ceremonial post as president. It was unclear whether the new government — still being formed — would support his position.
The insurgents want the United States to leave Iraq but have not put forward any other political demands or conditions to halt their violent resistance.
In other developments:
One of the three car bombs that hit Baghdad on Friday exploded in an eastern neighborhood where U.S. forces were on patrol, killing a civilian and wounding three others, a police official said on condition of anonymity.
A second blast didn't appear to cause any injuries, said Capt. Talib Thamir.
The third exploded near a U.S. convoy in the western Mansour district, witnesses said. A damaged Humvee could be seen in the area, which was sealed off by U.S. forces.
At least five civilians were injured in the blast, said Ihssan Abdul Razaq, an official at the Yarmouk Hospital, where rescue workers brought the wounded. The U.S. military said one soldier was also hurt.
Al Qaeda in Iraq claimed responsibility for the attack, one of several the terror group has said it carried out this week against U.S. targets.
On Thursday, the group said it carried out twin car bombs that killed 18 people and wounded more than 30 others in Baghdad, the highest death toll from an explosion in Iraq in more than a month. On March 10, a suicide bomber blew himself up at a funeral, killing 47 people.
In a statement posted Friday on the Islamic Ansar Web site, the group said: "One of God's lions from the martyrdom seekers' brigade took off this morning Friday and rammed his car into a convoy of Americans." The statement could not be verified.