Hopes for peace in the violence-torn Sudanese
"We decided not to go," said Ahmed Tugod Hassan, the chief negotiator of the Justice and Equality Movement (JEM).
He said the decision was made on Friday with the Sudan Liberation Army (SLA) unity factions after consultations in the run-up to the talks scheduled to begin on Saturday.
International mediators had hoped as many rebels as possible would attend the talks to negotiate a ceasefire.
Since a peace deal signed by only one of three rebel factions last year, the fighters have split into more than a dozen groups.
Clinging to hope
In Sirte, Jan Eliasson, the UN special envoy for
He said this was an "irreversible process" and represented "a very important step towards a political settlement".
But Mohammed Adow, Al Jazeera's correspondent, said only "a handful of
"They have been struggling to find common ground before negotiations begin. And their dismal number has been a concern for the mediators. But they are vowing to carry on."
He said Abdelwahid Elnur, leader of the Sudan Liberation Movement (SLM), had rejected the talks and Khalil Ibrahim, the main leader of JEM, was not attending either.
Frustration
Speaking from
Likewise, speaking from Al Fasher in northern
"The leaders of the Darfur groups such as Elnur and the JEM say they will not attend the peace talks in deference out of respect for the wishes of the people.
"But when we talk to the people here, they say they are not very well informed about the situation and follow the developments on the basis of what their leaders tell them."
The run-up to the talks has also been overshadowed by a rebel attack against an oilfield in a region disputed by
The JEM claimed to have kidnapped two foreign oil workers.
Criticism
Vall said some groups claim that many
Othman Kibir, the governor of north Darfur, said: "
"To the representatives of the United Nations and the African Union, I urge you to be part of the solution, not part of the problem."
Meanwhile, in the southern city of
Increasing tension
Fighting has continued on the ground despite repeated assertions from all parties that a fragile ceasefire is still holding.
Vall also said that the political mood in the Sudanese capital
"The stand off over the implementation of a 2005 peace agreement is continuing between the ruling party and the Sudan People's Liberation Movement, its southern partner in the unity government," he said.
"The real crisis is a Sudan crisis - it's not just about Darfur. If an agreement is reached in
"After that, due to other tensions, another war could break out between the North and the South. There needs to be a comprehensive solution for
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Negotiators from the