UN Secretary-General Antonio Guterres appealed on Monday for countries to step up aid pledges for Sudan, where a conflict between rival military factions has forced some 2.2 million people from their homes and sparked a major humanitarian crisis.
The United Nations says about $3 billion is needed this year for humanitarian relief inside Sudan and for refugees fleeing the country, only a fraction of which has been funded.
"Without strong international support, Sudan could quickly become a locus of lawlessness, radiating insecurity across the region," Guterres told a fundraising conference hosted by Germany, Saudi Arabia, Qatar, Egypt and the United Nations.
"I appeal to you all today to provide funding to deliver lifesaving humanitarian aid and support to people living in the most difficult and dangerous conditions," Guterres said.
Germany announced on Monday that it was pledging 200 million euros to Sudan and the region until 2024, the United States pledged $171 million, and Qatar pledged $50 million. The UN said it was allocating an additional $22 million to address priority needs.
The war between Sudan's army and the paramilitary Rapid Support Forces (RSF) began in mid-April amid tensions over an internationally-backed plan for a transition towards elections under a civilian government.
It has left more than 3,000 people dead, turned the capital Khartoum into a war zone and triggered deadly violence in the conflict-scarred western region of Darfur as well as other parts of the country.
Monday is the second day of a 72-hour ceasefire brokered by Saudi Arabia and the United States at talks in Jeddah, the latest of a series of truce deals that have allowed for the delivery of some humanitarian aid but have failed to prevent the conflict from intensifying.
Residents in Khartoum say the truce has bought a lull in fighting since Sunday, though looting by RSF forces and armed gangs has spread as battles have subsided.
Guterres said he was especially concerned by ethnic violence in Darfur and reports of gender-based and sexual violence. UN human rights chief Volker Turk said his office had received reports of sexual violence against at least 53 women and girls, saying that some 18-20 women were raped in a single attack.
Before the donor conference, a UN appeal for $2.57 billion for humanitarian support within Sudan this year was about 17% funded, a UN website showed.
The UN has separately appealed for nearly $500 million in aid for refugees fleeing from Sudan, which UN refugee agency chief Filippo Grandi said was 15% funded, a situation he called "deeply distressing".