In today’s newsletter: Amid gunsmoke and airstrikes, civilians must choose whether to travel towards uncertain safety, or risk violence by staying behind. What questions face anyone trying to leave – and what might happen if they go?

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Good morning. For at least some of the British nationals attempting to flee the conflict that has broken out in Sudan, this morning is a moment of profound relief: the second of three evacuation flights from an airfield north of Khartoum recently arrived in Cyprus, with a third expected soon. Citizens of Turkey, France, and other countries were also flown out. But for Sudanese people – even those whose close relatives were aboard the UK flights – the exodus may simply have served as a reminder of the dangers from which they have far more limited respite.

A ceasefire between army units loyal to Sudan’s military ruler, Gen Abdel Fattah al-Burhan, and the Rapid Support Forces (RSF) led by his former ally Gen Mohamed Hamdan Dagalo, known as Hemedti, came into effect at midnight on Tuesday, and it is supposed to last for two more days. In theory, this should provide an opportunity for civilians to flee the theatres of conflict and reach safe harbour.

US news | Joe Biden has formally announced his campaign for re-election in 2024, asking Americans for four years to “finish this job”, possibly setting up an extraordinary rematch with Donald Trump. Vice-president Kamala Harris, the highest-ranking woman and person of colour in US politics, will be Biden’s running mate again.

Monarchy | New court filings submitted by Prince Harry reveal that his brother Prince William received a previously undisclosed “very large sum of money” in 2020 to settle a phone-hacking claim against the owner of the Sun and the News of the World. The high court also heard that Queen Elizabeth II personally threatened News UK with legal proceedings over hacking, only to be undermined by the then Prince Charles.

Immigration | The UK government secretly deported more than 100 Nepali guards who risked their lives to protect British embassy staff in Afghanistan before the Taliban seized back control in 2021, days after they arrived. The decision was taken even though many had been issued with six-month visas on arrival.

Politics | The head of the civil service has attempted to block Sue Gray from working with Labour until after the next general election, the Guardian has been told. Keir Starmer’s choice for his new chief of staff caused controversy when it was unveiled as Gray had led the civil service inquiry into the Partygate scandal.

Music | Harry Belafonte, the singer, actor and civil rights activist who broke down racial barriers in the US, has died aged 96. Read a tribute by the director Steve McQueen: “He had everything, but his service was always to his people.”

Senior aid worker issues warning over armed seizure of Khartoum lab containing deadly diseases

• Sudan crisis – latest updates

Airstrikes and reports of renewed fighting have threatened a delicate three-day truce in Sudan, while a senior aid worker warned of a potential “huge biological hazard” resulting from the armed seizure of a Khartoum laboratory containing deadly diseases.

A 72-hour ceasefire came into effect across the country at midnight on Monday night and was largely holding. It is intended to give Sudanese people respite from days of bloodshed and allow the wounded to reach already limited medical care. World powers hope it will also provide time for a massive international rescue mission to fly out evacuees.

This blog is now closed. You can find the latest news from Sudan at the links below:

• Sudanese Armed Forces and Rapid Support Forces agree ceasefire, says Blinken
• RAF plane lands in Sudan as UK assesses options for further evacuations
• Sudan: thousands flee Khartoum as civilian casualties escalate
• ‘Very difficult evacuation’: how UK diplomats were rescued

Here’s a short round up of the response by African countries.

Kenya has said it will not be withdrawing its diplomats from Sudan as it wants them to help negotiate a “peaceful solution” to the conflict.

Lack of supplies and rising prices add to perilous journey by road to Egyptian border and Port Sudan

Thousands more residents of Khartoum fled the Sudanese capital on Monday, risking long, dangerous journeys to escape continued street battles and murderous airstrikes that continue to cause significant civilian casualties.

Some headed north by road to the Egyptian border in packed buses, many with towering piles of luggage strapped to them. Others drove north-east to Port Sudan. Both journeys involved up to 24 hours of driving, with increasing reports of robbery of vehicles.