Israel's president said at a Holocaust remembrance ceremony on Thursday that the return of hostages held by Palestinian militants in Gaza was a "universal moral imperative" and called on the international community to help end "this horrific humanitarian crime".

Isaac Herzog spoke from the southern Polish city of Oswiecim, the site of the former Nazi German death camp Auschwitz-Birkenau, on the occasion of the annual March of the Living to commemorate its victims.

Israel's president said in Poland on Thursday the return of hostages held by Palestinian militants in Gaza was a "universal moral imperative" and called on the international community to help end "this horrific humanitarian crime".

Isaac Herzog spoke from the southern city of Oswiecim, the site of the former Nazi German death camp Auschwitz-Birkenau, on the occasion of the annual March of the Living to commemorate its victims.

In Gaza, where hunger gnaws and hope runs thin, flour and bread are so scarce that they are carefully divided by families clinging to survival.

"Because the crossing points are closed, there's no more gas and no flour, and no firewood coming in," said Umm Mohammed Issa, a volunteer helping to make bread with the few resources still available.

Israel resumed military operations in the Palestinian territory in mid-March, shattering weeks of relative calm brought by a fragile ceasefire.

As America's escalated bombing campaign and economic sanctions hit Yemen hard, the Iran-backed Huthi rebels in Washington's crosshairs are trying to mine the situation for propaganda and recruitment, analysts said.

On Monday, four days after 80 people were killed in US strikes on a fuel port, the Huthis released a slick promotional video showing special forces marching over the Israeli flag and somersaulting through flaming hoops.

Israel's Prime Minister Benjamin Netanyahu, speaking Wednesday at an annual Holocaust commemoration, said Iran was an existential threat and warned that "the fate of all humanity" was at stake if it acquires nuclear arms.

Netanyahu was speaking at the start of Israel's Holocaust Remembrance Day, which commemorates the murder of six million Jews by the Nazis during World War II, and is observed every year in April or May according to the Jewish calendar. The International Holocaust Remembrance Day is marked on January 27.

The Cannes film festival said Wednesday that the screening of a documentary about Gaza photojournalist Fatima Hassouna at the event next month would honour her work after the "horror" of her death in an Israeli air strike last week.

"Put Your Soul on Your Hand and Walk" by Iranian director Sepideh Farsi is to be shown at ACID Cannes, at this year's May 13-24 festival, which runs parallel to the main competition.

The film features conversations between Farsi and Hassouna, 25, as she documents the impact of Israel's devastating war on the Palestinian territory.

Jordan announced on Wednesday it was banning the activities of the Muslim Brotherhood, a transnational Islamist movement, accusing it of manufacturing and stockpiling weapons and planning to destabilise the kingdom.

The move comes after authorities said they arrested 16 people, including members of the Brotherhood, over an alleged sabotage plot.

"It has been decided to ban all activities of the so-called Muslim Brotherhood and to consider any activity (carried out by it) a violation of the provisions of the law," Interior Minister Mazen al-Faraya told reporters.

The head of the UN nuclear watchdog agency called Wednesday on Iran to explain tunnels built around a nuclear site but voiced optimism that US-Iran talks would land a deal.

The Institute for Science and International Security, a Washington think tank, released satellite imagery on Wednesday that it said showed a new, deeply buried tunnel alongside an older one around the Natanz site, as well as a new security perimeter.

Tears mixed with smiles as a dense crowd flocked to the requiem mass for the pope at Jerusalem's Church of the Holy Sepulchre on Wednesday.

"He gave us hope, and we will keep that hope with us forever even in this situation in Palestine", said Na'ma Tarsha, a retiree from the Mount of Olives in east Jerusalem, a part of the city occupied and annexed by Israel in 1967.

Dressed entirely in black, the 75-year-old woman said she was determined to take part in the mass for Pope Francis, who died on Monday aged 88.

A 6.2-magnitude earthquake hit the Sea of Marmara near Istanbul on Wednesday, with its impact and that of multiple aftershocks forcing thousands out onto the streets in panic across Turkey's largest city.

The quake was followed by more than 50 aftershocks, some very powerful, the interior minister said, although there were no reports of major damage or serious injury.

"An earthquake of 6.2 magnitude occurred in Silivri, Sea of Marmara, Istanbul," Interior Minister Ali Yerlikaya said on X, adding that it was felt in the surrounding provinces.