Western leaders have condemned videos of emaciated Israeli hostages filmed by their captors in Gaza, with the Red Cross calling for access to all remaining in captivity.

UK Foreign Secretary David Lammy said “images of hostages being paraded for propaganda are sickening” and they must be released “unconditionally”.

The calls come after the Palestinian Islamic Jihad published video of Rom Braslavski, thin and crying, on Thursday, and Hamas released footage of an emaciated Evyatar David on Saturday.

Israeli leaders accused Hamas of starving hostages.

Hamas’s armed wing denied it intentionally starves prisoners, saying hostages eat what their fighters and people eat amid a hunger crisis in Gaza.

Both Braslavski, 21, and David, 24, were taken hostage from the Nova music festival on 7 October 2023 during the Hamas-led attack on southern Israel.

They are among 49 hostages, out of 251 originally taken, who Israel says are still being held in Gaza. This includes 27 hostages who are believed to be dead.

After the videos were released, Israel’s Prime Minister Benjamin Netanyahu spoke with the two hostage families, expressing “profound shock” and telling them that efforts to return all the hostages “will continue constantly and relentlessly”.

On Sunday, Netanyahu spoke to the head of the Red Cross in the region, requesting his immediate involvement in providing food and medical care to hostages.

The International Committee of the Red Cross (ICRC) said it was “appalled” by the videos that gave “stark evidence of the life-threatening conditions in which the hostages are being held”.

The charity reiterated its call to be granted access to the hostages to assess their condition, give them medical support and facilitate contact with their families.

Hamas’s armed wing Al-Qassam Brigades said it would respond positively to any Red Cross request to deliver food and medicine to prisoners if humanitarian corridors were opened into Gaza on a regular and permanent basis, and air strikes halted during the time of receiving aid.

The Red Cross has faced heavy criticism in Israel over its role in the war, with claims that it has failed to help the hostages being held in Gaza.

Earlier this year, amid anger over chaotic scenes as hostages were freed as part of a deal between Israel and Hamas, the organisation explained the limits of its role, saying it relies on the warring parties’ goodwill to operate in conflict zones.

There has also been criticism from Palestinians, as the group has not been allowed to visit Palestinian prisoners being held in Israeli jails since 7 October 2023.

At the weekend in Tel Aviv, crowds of protesters and hostage families gathered once again, calling on the Israeli government to secure the release of hostages.

David and Braslavski’s families said at a rally on Saturday that “everyone must get out of hell, now.”

In one video, Braslavski is seen crying as he says he has run out of food and water and only ate three “crumbs of falafels” that day. He says he is unable to stand or walk, and “is at death’s door”.

Braslavski’s family in a statement said “they managed to break Rom” and pleaded to Israeli and US leaders to bring their son home.

“He has simply been forgotten there,” they said.

German Chancellor Friedrich Merz said he was “appalled” by the images, adding the release of all hostages was a mandatory prerequisite for a ceasefire between Israel and Hamas.

French President Emmanuel Macron, who said Hamas embodies “abject cruelty”, added France continues to work tirelessly towards the release of hostages, to restore a ceasefire, and to enable humanitarian aid to enter Gaza.

He said this effort must be accompanied with a political solution, with a two-state solution “with Israel and Palestine living side by side in peace”. France recently announced its intention to recognise a Palestinian state, along with Canada and the UK, under certain conditions. Israel has strongly condemned the moves.

The images of emaciated hostages are coming out as UN-backed agencies have said the “worst-case scenario of famine is currently playing out” in Gaza, with malnutrition deaths reported daily.

The Hamas-run health ministry said on Sunday that 175 people, including 93 children, have died of malnutrition since the start of the war.

The UN, aid agencies and some of Israel’s allies blame the hunger crisis on Israeli restrictions on the entry and delivery of humanitarian aid. Israel denies the allegation and blames Hamas.

Despite the overwhelming evidence, Israeli authorities, and part of the country’s press, strongly reject that there is starvation in Gaza, and say the crisis is a lie fabricated by Hamas and spread by international media.

Some pictures of emaciated children have been displayed by Israeli protesters calling for a deal with Hamas, but many in Israel seem unaware of the extent of the emergency there.

As the war continues, Israel faces growing international isolation, as the widespread destruction in Gaza and the suffering of Palestinians spark outrage.

Polls around the world suggest that public opinion is increasingly negative about Israel, which is putting pressure on leaders to act.