The UN human rights chief has urged the two warring generals in Sudan to stop sexual violence and spare the lives of civilians.
Volker Turk described the conflict as heart-breaking.
He called on Abdel Fattah al-Burhan and Mohamed Hamdan Dagalo to stop what he called the senseless violence immediately.
There has been a reduction in the fighting since a ceasefire came into effect on Monday.
But people in Khartoum say clashes have continued in some parts of the city.
In El Obeid – the capital of North Kordofan State – a doctor told the BBC five people had died as the truce had been ignored.