Sudan's ruling generals and protest leaders reached a "full agreement" on the constitutional declaration, the African Union said on Saturday, paving the way for transitioning to civilian rule.

Sudanese protest leaders cancelled planned talks with the country's ruling generals Tuesday as hundreds of schoolchildren demonstrated in Khartoum against the shooting dead of five pupils at a rally.

The head of an official Sudanese investigation said on Saturday 87 people were killed when security forces broke up a protest on June 3

A Sudanese civilian detained and allegedly tortured by security agents in a central town has died in custody, a doctors committee linked to the country's protest movement said

Thousands of Sudanese demonstrators converged Thursday on a prominent square in Khartoum in a march through the capital to honour comrades killed in the months-long protest movement that has rocked the country.

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.

Paramilitary forces backed by Sudan's ruling military council fired at protesters in the southeastern state of Sennar on Sunday, witnesses said, and one man died of a shot to the head, according to opposition medics.

Thousands of Sudanese demonstrators took to the streets in cities across the country on Saturday, witnesses said, to mark 40 days since security forces stormed a protest camp in the capital Khartoum, killing dozens.

Sudan's ruling military council and a coalition of opposition and protest groups have agreed to share power for three years and then hold elections, in a deal that brought thousands of people onto the streets to celebrate.

Talks between Sudan's ruling generals and protest leaders, held after weeks of standoff following a deadly crackdown on protesters, enter a second day Thursday with the key issue of forming a new governing body still unresolved.

Sudan's main opposition alliance said on Wednesday it was prepared for direct talks with the country's military rulers over who should head a sovereign council to lead Sudan toward elections.

A Canadian lobbying firm has signed a $6mn deal to clean up the image of feared Sudanese military leader Hemedti and grant his provisional military council diplomatic recognition and international funding, according to the contract document published by the US.