Sporadic artillery fire still echoed in Sudan's capital Tuesday but residents said fighting had calmed following a US and Saudi-brokered ceasefire, raising faint hopes in the embattled city.

In the sixth week of war, witnesses reported a relative calm had taken hold, both in greater Khartoum and in the Darfur region's cities of Nyala and El Geneina, which have been among the other main battlegrounds.

"We have not heard shelling in our neighbourhood since last night," said a witness in southern Khartoum.

Iran's President Ebrahim Raisi on Monday appointed a Revolutionary Guards general as the country's top security official, replacing Ali Shamkhani after nearly a decade marked by headway in Gulf diplomacy.

"Ali Akbar Ahmadian was appointed as the secretary of the Supreme National Security Council by the decree of the president," the official presidential website reported.

The Islamic republic's highest security body, the council reports to supreme leader Ayatollah Ali Khamenei who has the final word on all major policy decision.

Israeli forces killed three Palestinian fighters Monday in a raid on a refugee camp in the occupied West Bank in what the army described as an operation targeting "terrorist" suspects.

In a statement, the Palestinian health ministry identified the three men killed in Balata camp in Nablus as Muhammad Abu Zaytoun, 32, Fathi Abu Rizk, 30, and Abdullah Abu Hamdan, 24.

The Al-Aqsa Martyrs' Brigades, the armed wing of Palestinian president Mahmud Abbas's Fatah party, said in a statement that the three were among the group's "fighters".

Young Iraqis row a flotilla of traditional wooden boats down the Tigris river in Baghdad, celebrating an ancient nautical heritage in the now drought-stricken country.

Once a common sight across Iraq's southern streams and marshlands, the elongated boats with tapered bows and sterns known as meshhouf have been around "since the time of the Sumerians", said event organiser Rashad Salim.

But the elegant water craft have long been vastly outnumbered by modern, motorised vessels and are threatened further as Iraq's waterways suffer from droughts linked to climate change.

Lebanese activists protested Sunday at a beach in the coastal city of Sidon after a woman said she was harassed there over her allegedly indecent bathing suit, an AFP correspondent said.

Defying a municipality ban on their demonstration, dozens of protesters, mostly women, gathered briefly in the Sunni Muslim-majority conservative city, the correspondent said.

"We have all come to support women's right to be in public spaces, whether in a bikini or a burkini," said Diana Moukalled, a journalist and women's rights activist.

Lebanon's Hezbollah movement simulated cross-border raids into Israel Sunday in a show of its military might, using live ammunition and an attack drone, AFP correspondents said.

Around 200 Hezbollah fighters took part in the raids, part of large-scale military exercise in Aaramta, around 20 kilometres (12 miles) north of the Israeli border.

Dozens of journalists were invited to the event which took place ahead of the anniversary next week of Israel's withdrawal from southern Lebanon in 2000.

Air raids, gunfire and explosions rocked Sudan's capital on Sunday ahead of a one-week ceasefire agreed by rival generals, the latest in a series of truces that have been systematically violated.

The ceasefire is focused on enabling humanitarian assistance to civilians. It is to take effect at 9:45 pm (1945 GMT) on Monday, the United States and Saudi Arabia said in a joint statement late Saturday after talks in the Saudi city of Jeddah.

In a deserted neighbourhood of Khartoum North, Hussein Mohammed hopes that, finally, the guns will silence.

Israel's National Security Minister Itamar Ben-Gvir visited the flashpoint Al-Aqsa mosque compound Sunday, a controversial move by the extreme-right politician amid heightened tensions in annexed east Jerusalem.

The move came three days after Ben-Gvir and tens of thousands of Jewish nationalists marched through the Old City and just over a week into a fragile Gaza ceasefire.

"Jerusalem is our soul," Ben-Gvir wrote on Telegram, alongside a photo of himself at the site in the heart of the Old City.

Faced with mounting pressure over planet-heating pollution, Gulf Arab energy giants are turning to humble tech start-ups as they search for ways to remove emissions while keeping oil flowing.

Oil producers have for years touted capturing carbon before it goes into the atmosphere as a potential global warming solution, against criticism from climate experts who say it risks distracting from the urgent goal of slashing fossil fuel pollution.

The second-ever private mission to the International Space Station (ISS), organized by Axiom Space, blasted off from the southern US state of Florida Sunday, carrying the first two Saudi astronauts to travel to the orbiting laboratory.

Rayyanah Barnawi, a breast cancer researcher, is the first Saudi woman to voyage into space and is joined on the mission by fellow Saudi Ali Al-Qarni, a fighter pilot.

The Axiom Mission 2 (Ax-2) crew took off aboard a SpaceX Falcon 9 rocket from the Kennedy Space Center in Cape Canaveral at 5:37 pm (2137 GMT).