JUBA — Sudan's government agreed on Monday to allow humanitarian relief to war-torn parts of the country and renewed a cease-fire pact with major rebel groups at peace talks in South Sudan.

Officials from all sides said the new administration in Khartoum and the two umbrella groups of rebels had signed a declaration to keep the doors open to dialogue.

"The political declaration will pave the way for political negotiations and is a step towards a just, comprehensive and final peace in Sudan," said General Mohamed Hamdan Daglo, a key figure in Sudan's transitional government.

Talks have been underway in Juba since last week between the new government in Khartoum and rebels who fought now-ousted president Omar Bashir's forces in Darfur, Blue Nile and South Kordofan states.

The new transitional authorities, tasked with leading the way to civilian rule after the ouster of Bashir, have vowed to bring peace to these conflict zones.

The peace talks have been held in the capital of South Sudan after its President, Salva Kiir, volunteered to mediate. Sudan's neighbor and former foe is struggling to end its own war.

One of the rebel movements involved in the talks, the Sudan Revolutionary Front (SRF), said the agreement reached in Juba was a good step.

"Peace is a very strategic goal for us. The transformation of Sudan is anchored on peace," said Hedi Idriss Yahia, who signed the agreement in Juba on Monday on behalf of the SRF.

Khartoum agreed to let aid into marginalized, conflict-wracked areas of Sudan long cut off from humanitarian groups during Bashir's rule. They include Darfur, the Nuba Mountains and Blue Nile regions.

The talks were almost derailed last week after one rebel group threatened to pull out unless the government withdrew from an area in the Nuba Mountains where it said government attacks were ongoing.

Hours later, Khartoum announced a "permanent cease-fire" in the three conflict zones.

An unofficial ceasefire had been in place since Bashir was ousted by the army in April, a palace coup that followed nationwide protests against his decades-old rule.

Bashir is currently on trial in Khartoum on charges of corruption after being overthrown following months of nationwide protests against his iron-fisted rule.