Rival factions of Sudan’s military have agreed to renew a three-day ceasefire, shortly before it was due to expire.
The extension – for another 72 hours – follows intensive diplomatic efforts by neighbouring countries, as well as the US, UK and UN.
But there are continuing reports of heavy fighting in the capital Khartoum.
The previous truce allowed thousands of people to attempt to flee to safety, while dozens of countries have tried to evacuate their citizens.
Almost two weeks of fighting between the army and a rival paramilitary group have left hundreds dead.
The ceasefire had been expected to end at midnight local time (22:00 GMT on Thursday).
Early on Thursday evening the Sudanese regular army agreed to an extension, and its rival the paramilitary Rapid Support Forces (RSF) followed suit hours later.
South Sudan has offered to host peace talks, and the army has agreed to send representatives to the talks.
soon as possible.
Speaking on Thursday evening, Ms Jean-Pierre urged Americans to depart within the next 24 hours.
Evacuations are continuing, but many foreigners are still stuck in Sudan. Some have struggled to get to the airstrip used for evacuations.
Local civilians are continuing to flee the capital, where there are problems with supplies of food, water and fuel.
The fighting broke out on 15 April as the result of a bitter power struggle between the regular army and RSF.
Army commander Gen Abdel Fattah al-Burhan and RSF chief Gen Mohamed Hamdan Dagalo, better known as Hemedti, disagree about the country’s proposed move to civilian rule, and in particular about the timeframe of the 100,000 strong RSF’s inclusion into the army.
Both factions fear losing power in Sudan because on both sides there are men who could end up at the International Criminal Court for war crimes committed in Darfur almost 20 years ago.
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