Sudan’s warring generals pledged Tuesday to observe a new three-day truce that was brokered by the United States and Saudi Arabia in an attempt to pull Africa’s third-largest nation back from the abyss.

The claims were immediately undercut by the sound of heavy gunfire and explosions in the capital of Khartoum. Residents said warplanes were flying overhead.

Several previous cease-fires declared since the April 15 outbreak of fighting were not observed, although intermittent lulls during the weekend’s major Muslim holiday allowed for dramatic evacuations of hundreds of diplomats, aid workers and other foreigners by air and land.

For many Sudanese, the departure of foreigners and closure of embassies is a terrifying sign that international powers expect a worsening of the fighting that has already pushed the population into disaster.

Many Sudanese have desperately sought ways to escape the chaos, fearing that the rival camps will escalate their all-out battle for power once evacuations are completed.