Smoke is seen in Khartoum, Sudan. Sudanese braced for more bloodshed on Monday after rival military forces accused each other of fresh violations. AP

In statements, both sides accused the other of violations. The agreement has deescalated the fighting in some areas but violence continues to push civilians to flee. Aid groups have also struggled to get badly needed supplies into the country.

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The conflict erupted on April 15 between the nation’s army and its paramilitary force, and threatens to thrust Sudan into a raging civil war. The U.N. warned on Sunday that the humanitarian crisis in Sudan was at "a breaking point.”

"The scale and speed of what is unfolding in Sudan is unprecedented,” the UN’s humanitarian chief Martin Griffiths said in as statement.

He said water and food are becoming increasingly hard to find in the country’s cities, especially the capital, Khartoum, and that the lack of basic medical care means many could die of preventable causes. Griffiths said that "massive looting” of aid supplies has hindered efforts to help civilians.

A house hit in recent fighting is seen in Khartoum, Sudan. AP

Earlier Sunday, an aircraft carrying eight tons of emergency medical aid landed in Sudan to resupply hospitals devastated by the fighting, according to the International Committee of the Red Cross, which organized the shipment. It arrived as the civilian death toll from the countrywide violence topped 400 and aid groups warned that the humanitarian situation was becoming increasingly dire.

More than two-thirds of hospitals in areas with active fighting are out of service, a national doctors' association has said, citing a shortage of medical supplies, health workers, water and electricity.

The air-lifted supplies, including anesthetics, dressings, sutures and other surgical material, are enough to treat more than 1,000 people wounded in the conflict, the ICRC said. The aircraft took off earlier in the day from Jordan and safely landed in the city of Port Sudan, it said.

"The hope is to get this material to some of the most critically busy hospitals in the capital” of Khartoum and other hot spots, said Patrick Youssef, ICRC’s regional director for Africa.

The Sudan Doctors’ Syndicate, which monitors casualties, said on Sunday that over the past two weeks, 425 civilians were killed and 2,091 wounded. The Sudanese Health Ministry on Saturday put the overall death toll, including fighters, at 528, with 4,500 wounded.

Some of the deadliest battles have raged across Khartoum. The fighting pits the army chief, Gen. Abdel Fattah Burhan, against Gen. Mohammed Hamdan Dagalo, the head of a paramilitary group known as the Rapid Support Forces.

The generals, both with powerful foreign backers, were allies in an October 2021 military coup that halted Sudan's fitful transition to democracy, but they have since turned on each other.