President Donald Trump's senior Africa envoy, Massad Boulos, has rejected criticism that the US's latest proposal to end the Sudan civil war is 'biased'.

The US, Saudi Arabia, Egypt, and the United Arab Emirates (UAE) have been attempting to mediate between Sudan's army and the paramilitary Rapid Support Forces (RSF), which have been fighting for more than two years.

On Sunday, Sudan's army chief Abdel Fattah al-Burhan described the latest ceasefire proposal as unacceptable, claiming that future proposals would be biased as long as the UAE was part of the mediation process.

Mr. Boulos responded, asserting that the bias Burhan mentioned is non-existent, saying, 'He was making reference to something that does not exist, that has never been presented by us.'

Burhan criticized the latest peace initiative, labeling it as 'the worst ever' for sidelining the army and enabling the RSF to remain active.

Amid these tensions, on Monday, the RSF announced a unilateral ceasefire, citing international motives, including the influence of the US, while the Sudanese army alleged new RSF attacks just days prior.

Calls for a sustainable peace process intensify as the US and its partners continue to seek avenues to restore order and humanitarian access in Sudan, which has seen widespread displacement and crises as combat rages on.