The truce is due to end at midnight local time on Monday, though the warring factions, the army and the paramilitary Rapid Support Forces, have both expressed the possibility of an extension.

The RSF said that would depend on the army's "sincerity and commitment".

Saudi Arabia and the United States have urged a continuation, so that urgently needed humanitarian aid can be delivered to the millions of Sudanese plunged into six weeks of conflict.