South Sudan leading mediation efforts to end the conflict says the head of the paramilitary Rapid Support Forces has not responded to a proposal to extend the ceasefire to Sunday.
Foreign Minister Deng Dau Deng said that General Hamdan Dagalo has also not answered calls for face-to-face talks.
A statement from Sudan’s army said its leader General Abdel Fattah had given his initial approval to the request.
The ceasefire, due to end at midnight , between the Sudanese army and the RSF has been strained by reports of continued fighting and shelling in parts of Sudan.
Sudan’s health ministry says the number of people killed in the clashes between the army and the RSF is 512 – with another 4,193 injured.
A post on its Facebook page says: “The [ministry’s] report showed that there were 4,193 injuries and 512 deaths in the country, including 2,403 injuries and 169 deaths in Khartoum state during that period [between 15 to 25 April].”
Meanwhile, in a separate Facebook post, the Sudanese Doctors’ Syndicate put the civilian death toll from the fighting between 15 to 26 April at 303, with 1,848 injured.