A United Nations human rights expert on Sudan has called for accelerated investigations into the killings of protesters and other atrocities, as the death toll since last year’s coup nears 100.

Sudan has been rocked by deepening unrest and a violent crackdown against near-weekly mass protests since army chief Abdel Fattah al-Burhan’s power grab on October 25 derailed a fragile transition to civilian rule.

“It is simply unacceptable that 99 people have been killed and more than 5,000 injured as a result of excessive use of force by the joint security forces,” Adama Dieng told reporters on Saturday, quoting a toll provided by pro-democracy medics.

He called on authorities “to expedite” investigations into the killings of protesters.

On what is his second visit to Sudan since last year’s coup, Dieng raised concerns during talks with senior officials over arbitrary and mass arrests of activists, sexual and gender-based violence, and “acts of torture and ill-treatment” during detentions.

He said an inquiry set up by Sudanese authorities has confirmed “four cases of sexual violence” during the protests.

The UN expert also pointed to an intensification of an existing economic crisis since the coup, which has seen Western donors return to the sidelines, after a brief engagement with a civilian-military power-sharing government established in the wake of the deposing of President Omar al-Bashir in 2019.

Spiralling prices and a poor harvest are “forecast to dramatically increase the number of people living in poverty”, he noted.

Dieng is scheduled to meet al-Burhan later on Saturday.

On Friday, thousands of protesters took to the streets across Sudan to mark the third anniversary of a crackdown that medics say killed 128 people in June 2019, when armed men in military fatigues violently dispersed a weeks-long sit-in outside army headquarters.

A protester was killed during Friday’s demonstrations despite calls by Dieng, echoed by Western diplomats, for security forces to “refrain from excessive violence against protesters”.

The UN, along with the African Union and regional grouping IGAD, has been pushing for Sudanese-led talks to break the post-coup political impasse.

On Friday, UN special representative Volker Perthes announced the Security Council had voted to extend by one year the UN’s mission in Sudan.

Perthes, as well as AU and IGAD representatives, agreed with military officials to launch “direct talks” among Sudanese factions next week.

On Sunday, al-Burhan lifted a state of emergency in force since the coup to set the stage for “meaningful dialogue that achieves stability for the transitional period”.

Since April, Sudanese authorities have released several civilian leaders and pro-democracy activists.