The head of the US Agency for International Development (USAID), Samantha Power, is due to visit Ethiopia in a push for more humanitarian aid to be allowed into conflict-hit Tigray region.
Ms Power on Sunday held a meeting with Sudanese Prime Minister Abdallah Hamdok and other officials on Sudan’s role regional stability – with thousands of refugees from Tigray being hosted in the country.
The aid agency said the “catastrophic situation will only get worse” if there is no urgent humanitarian assistance to the region.
Last week, the US called for the authorities to allow in aid to the conflict-hit northern region, where hundreds of thousands are already experiencing famine-like conditions.
The US is providing over $149m (£107m) in humanitarian assistance to the region.