President Joe Biden has issued an executive order authorising sanctions against Sudan, saying the fighting must end.
Mr Biden called the violence a tragedy and a betrayal of the Sudanese people.
He said the violence in Sudan was "unusual and extraordinary threat to the national security and foreign policy of the United States".
Earlier, the director of National Intelligence, Avril Haines, told a US Senate committee that the conflict was likely to be protracted, as both sides believed they could win militarily and had few incentives to negotiate.
The latest ceasefire has failed to hold, with heavy fighting continuing in the capital Khartoum, as well as the adjoining cities of Omdurman and Bahri.
The World Food Programme has estimated that more than $13m (£10.3m) worth of food aid destined for Sudan has been looted since fighting broke out last month.
The WFP said pillaging in the country was rampant.
The UN children's agency, Unicef, warned the situation was teetering toward catastrophe, with youngsters increasingly caught in the crossfire.
Latest Stories
-
Actress Sola Sobowale debunks drug trafficking and arrests in Saudi Arabia
4 mins -
Zebra on loose after escape in US mountain country
17 mins -
Apple iPhone sales fall in nearly all countries
24 mins -
Bawumia takes campaign tour to Western Region
41 mins -
Ghana and India discuss trade at the fourth JTC meeting
1 hour -
Nkwanta South: MCE kneels to beg chiefs to give peace a chance
1 hour -
NDC hopes to win a majority of votes in Ho Central
1 hour -
Ghana moves up to 50th on World Press Freedom Index
1 hour -
I will make you millionaires – Bawumia assures small-scale miners
2 hours -
Majority caucus requests reconvening of Parliament
2 hours -
Ghana ranks as 4th most stressful country for workers in Sub-Saharan Africa
2 hours -
Today’s front pages: Friday, May 3, 2024
3 hours -
CAFCC: USM Alger file appeal at CAS to contest CAF’s decisions on RS Berkane jersey
3 hours -
Africa’s Outstanding Professional, Engr. Ebenezer Kwadjo Dankyi
4 hours -
‘Only 300 businesses in Ghana meet criteria to participate in AfCFTA’
4 hours