ABUJA, Nigeria – Sudan’s government and rebel representatives signed accords yesterday meant to end hostilities and guarantee aid groups access to 1.6 million people uprooted by conflict in Sudan’s bloodied western region of Darfur.

For the first time, Sudan agreed to the creation of “no-fly zones” over Darfur, banning military flights over rebel held territories.

Rebels and African Union mediators had demanded the no-fly zones following widespread accusations of government bombings of villages.

“It is really a historical moment,” Sudanese spokesman Ibrahim Mohammed Ibrahim said. “We will do our utmost to make sure it is implemented on the ground. Only that will bring peace and stability to Darfurians.”

Sudan signed the accords under international pressure, including the threat of U.N. sanctions, after 21 months of a conflict that has driven 1.8 million people – most of them non-Arab villagers – into camps in Darfur and Chad.

The accords on security and humanitarian access came in the third week of talks in Nigeria’s capital, after two previous rounds of African Union-brokered talks failed. President Obasanjo – current chairman of the African Union and the talks’ host – praised the accord.

“There is no problem in Africa that we cannot solve if we in Africa are given the opportunity,” he said. Mr. Obasanjo added that the African Union, which has more than 500 peacekeepers in Darfur, would “insist on the scrupulous implementation of the agreement.”

“Future violations of the agreement…should not and will not be tolerated because too many Darfurians have suffered because of violations of the cease-fire agreement,” Mr. Obasanjo said. Sudan and the Darfur rebels signed a cease-fire accord in Chad in April, which failed to hold.

Government and rebel delegates will remain in Abuja for at least one more day to try to reach a political accord with long-term solutions to the Darfur crisis, said the chief mediator at the talks, Allam-Mi Ahmad.

In the Sudanese capital, Khartoum, meanwhile, the government said yesterday it would cooperate fully with a United Nations team investigating claims of genocide and human rights violations in Darfur. The International Commission of Inquiry team arrived in Khartoum on Sunday.

Darfur’s bloodletting began in February 2003,when Sudan’s Arab-dominated government was accused of unleashing Arab tribal militias against non-Arab African farmers there after attacks by the two newly emerged rebel groups.

Sudanese warplanes are accused of backing the so-called Janjaweed militia in simultaneous raids. Sudan denies the accusation. While no firm figure exists on the number of people killed in the attacks, the World Health Organization says more than 70,000 of the displaced people have died from disease, malnutrition, and other hardships caused by being uprooted.