(AFP) - Sudan's protesters and ruling generals Wednesday inked a deal that aims to install a civilian administration, a key demand of demonstrators since president Omar al-Bashir was deposed in a coup three months ago.

The move loosens a deadlock that has gripped the country, following nationwide mass protests that began against Bashir in December but then continued after a military council ousted him on April 11.

The deputy chief of the military council General Mohamed Hamdan Dagalo -- who initialled the deal on behalf of the generals on Wednesday -- told AFP the agreement was a "historic moment" for Sudan.

It has "opened a new and promising era of partnership between the armed forces, RSF (Rapid Support Forces) and leaders of the glorious Sudanese revolution," Dagalo said after he had put pen to paper.

Dagalo also heads the RSF, a feared paramilitary organisation that has its origins in the Janjaweed militias unleashed against African rebels during the early 2000's in Darfur.

Ibrahim al-Amin, a key protest leader, confirmed "today, we completed the political declaration."

Intense talks took place through the night over details of the political declaration at a luxury hotel on the bank of the Nile river in the capital, an AFP correspondent reported.

As the generals stepped out of the hall after the inking of the deal, a small crowd -- including women waving the national flag -- chanted "civilian rule, civilian rule."

The landmark power sharing deal, which was agreed in principle on July 5, has been brokered by African Union and Ethiopian mediators after weeks of stop-start negotiations between the protest umbrella group and ruling generals.

"The Transitional Military Council and the Alliance for Freedom and Change have reached a very important agreement that constitutes a crucial step towards a comprehensive reconciliation," said African Union mediator Mohamed El Hacen Lebatt.

- Immunity for generals? -

The accord stipulates that a new transitional civilian-military ruling body be established, in a bid to end the country's months-long political crisis.

This governing body will be comprised of six civilians and five military representatives.

The civilian representation will include five from the Alliance for Freedom and Change, according to the declaration.

A general will head the ruling body during the first 21 months of a transition, followed by a civilian for the remaining 18 months, according to the framework agreement.

The governing council is to oversee the formation of a transitional civilian administration that will operate for just over three years, after which elections would be held.

Amin said Wednesday that wider power sharing details would be fleshed out in a "constitutional document" and that talks would "resume... on Friday".

These talks are expected to address whether to grant "absolute immunity" to generals for violence against protesters.

Prior to entering the latest talks on Tuesday evening, protest leaders had rejected any such offer of immunity to the generals.

"We totally reject it," protest leader Ahmed al-Rabie, who initialled Wednesday's accord along with Dagalo, told AFP on Tuesday.

But military council spokesman General Shamseddine Kabbashi sought to talk down any friction over proposed immunity.

"There is no dispute about immunity," he told AFP on Wednesday.

Other issues still to be ironed out include the creation of a transitional parliament and a potential RSF withdrawal from Khartoum -- the latter an increasingly vocal demand of citizens on the streets.

Tensions climaxed on June 3 when armed men in military fatigues stormed a longstanding protest camp in Khartoum, shooting and beating crowds of demonstrators in a pre-dawn raid.

Dozens were killed and hundreds wounded, triggering international outrage -- and allegations that the RSF was behind the killings -- although the generals insisted they did not order the violent dispersal of protesters.

The RSF has faced further fury after the protest movement accused its members of being responsible for the deaths of six civilians since Saturday, including one allegedly shot dead and another who was allegedly tortured.

Dagalo has insisted that accusations against his paramilitary force represent an attempt to distort its image.

Talks to progress the details of the overall power sharing deal had been postponed several times since July 5 at the request of protest leaders.

© Agence France-Presse