The Gaza Humanitarian Foundation said on Saturday that two American aid workers were injured in an attack on one of its food distribution sites, as Hamas authorities reported at least 32 people killed by the Israel Defense Forces across the Strip.

The US- and Israeli-backed GHF, which seeks to circumvent Hamas in the distribution of aid but has been criticized by the UN and other humanitarian groups, said in a statement that the injured Americans were receiving medical treatment and were in a stable condition.

“The attack – which preliminary information indicates was carried out by two assailants who threw two grenades at the Americans – occurred at the conclusion of an otherwise successful distribution in which thousands of Gazans safely received food,” said the GHF, which has previously accused Hamas of killing at least eight of the agency’s Palestinian staffers.

It was not immediately clear who was behind Saturday’s attack.

Gaza’s Hamas-run interior ministry on Thursday had warned residents of the coastal enclave not to assist the GHF, saying deadly incidents near its food distribution sites endangered hungry Gazans.

Israel has accused Hamas of hijacking aid deliveries by other humanitarian groups. The GHF, which in addition to aid workers employs private US military contractors to protect its distribution sites, says that since starting operations in May it has delivered supplies to Palestinians, while other humanitarian groups had “nearly all of their aid looted.”

GHF says its boxes contain enough food for 5.5 people for 3.5 days, but the contents are dry food products that require preparation elsewhere in war-ravaged Gaza, where community kitchens and cooking supplies are limited.

The UN Human Rights Office said Friday more than 500 people had been killed in the vicinity of the GHF sites since Israel lifted an 11-week aid blockade on Gaza in May. GHF’s chairman Johnnie Moore has denied any Palestinians have been killed in or near its four distribution sites.

Israel has accused Hamas of attacking Gazan aid seekers and falsifying death tolls but has also acknowledged that Palestinian civilians have been killed near GHF aid distribution sites. The IDF says troops have been issued new instructions following what it called “lessons learned.”

Turkish President Recep Tayyip Erdogan, a fierce critic of Israel’s offensive in Gaza, said he asked US President Donald Trump at the NATO summit in The Hague last month to intervene in the shootings near the aid centers, according to Turkey’s state-owned Anadolu news agency.

“There are people who are being killed in food queues. You need to intervene here so that these people are not killed,” Erdogan reportedly said.

On Saturday, Israeli strikes killed at least 32 people in Gaza, including eight people killed near an aid distribution site in the Strip’s south, according to Hamas’s civil defense agency. It was not immediately clear if the aid site in question belonged to the GHF.

Civil defense spokesman Mahmoud Bassal, who Israel has said is an active Hamas terrorist, said five people were killed in a strike on a school in Gaza City, in the Strip’s north.

Another strike near another school in the city where displaced civilians had found shelter killed three people and wounded around 10, including children, he said.

Many Gazans have sought shelter in schools and other public buildings since the war began, sparked by the Hamas-led terror onslaught on southern Israel in which some 1,200 people were killed and 251 taken hostage.

Contacted by AFP, the IDF said it could not comment on specific strikes without precise coordinates.

The military says it is taking steps, including the use of aerial intelligence and precision munitions to mitigate harm to civilians, and accuses Hamas of embedding itself in civilian infrastructure, including schools.

According to Gaza’s Hamas-run health ministry, more than 57,000 people have been killed in the Strip since the war there began on October 7, 2023.

The Hamas-provided death toll cannot be independently verified and does not distinguish between civilians and combatants. Israel says it has killed some 20,000 combatants in battle as of January and another 1,600 terrorists inside Israel during the Hamas onslaught that sparked the war.