"We have reached agreements on many topics," speaker Hashim al-Hassani told parliament. "Some matters are still pending. Despite all efforts, we have not been able to reach agreements that please everyone."
Two Shitte officials said the two key issues that remained unresolved were women's rights and whether Kurds might someday secede.
"Regrettably we were not able to reach a draft we could all agree on," Kurdish minister Barhem Saleh said. "We agreed to extend the period to discuss the draft for a maximum of 10 days, maybe 7-10 days."
He said the draft will be presented to the National Assembly and that discussions over the constitution would continue. "If we don't reach an agreement, then the National Assembly will be dissolved, and we will call for general elections for a new National Assembly in a maximum period before Oct. 10," he said.
Today was the deadline for finalizing a constitution, but that had been delayed by disagreements between Shiites and Kurds.
In other developments:
The National Assembly had been scheduled to convene at 6 p.m. to consider the draft but moments ahead of the time, members had been advised that the new starting time was 8 p.m.
A few minutes before the original starting time, Tariq al-Hashimi, the general secretary of Iraq's biggest Sunni political group, the Iraqi Islamic party, told Al-Jazeera television that the disagreements were broader than simply between Sunnis and the others.
Instead, he said there still "points of disagreement" among Shiites and Kurds and that it might be better to delay a decision.