Sudan has declared an amnesty for the tens of thousands who fought in its civil conflicts excluding those faced with charges of genocide or war crimes.

Sudanese asylum seekers living in Israel fear being kicked out once ties are normalised between the two countries, though some hope their presence will be seen as an advantage.

A Sudanese protester was killed late Wednesday as security forces moved to disperse demonstrations against the transitional government's failure to address a deepening economic crisis, doctors close to the protesters said.

Sudanese security forces closed off major thoroughfares in the heart of the capital before dawn on Wednesday following online calls for renewed protests against a worsening economic crisis.

With weeks to go before US elections, Secretary of State Mike Pompeo is racing to make a breakthrough with Sudan that he hopes could also benefit Israel.

Sudan's new civilian-led government is urgently seeking to be removed from the US blacklist of state sponsors of terrorism, and is seen by Washington as open to becoming the latest Arab state to recognize Israel -- a major cause for President Donald Trump's electoral base.

The trial of Sudan's deposed strongman Omar al-Bashir over his role in the 1989 military coup that brought him to power was adjourned to September 22, the judge said Tuesday.

Sudan's government and rebel forces have agreed a landmark deal aimed at ending decades of war in which hundreds of thousands of people have been killed.

Clashes between soldiers and civilians during a disarmament exercise in the central South Sudanese town of Tonj have left 127 dead, the army spokesman said Wednesday.

The trial of Sudan's ousted ex-president Omar al-Bashir was delayed Monday at the request of his defence, a prosecution lawyer said.

UN officials on Sunday reported a fresh massacre of more than 60 people in Sudan's West Darfur, as the country's prime minister promised fresh troops for the conflict-stricken region.

Attackers targeted members of the local Masalit community, looting and burning houses and part of the local market, a statement said.