JERUSALEM (AP) — Israeli Prime Minister Benjamin Netanyahu said Thursday that Israel has "activated" some clans of Palestinians in Gaza that are opposed to Hamas, though it was not immediately clear what role they would play.

His comments on social media were the first public acknowledgment of Israel's backing of armed Palestinian groups within Gaza, based around powerful clans or extended families.

Such clans often wield some control in corners of Gaza, and some have had clashes or tensions with Hamas in the past. Palestinians and aid workers have accused clans of carrying out criminal attacks and stealing aid from trucks. Several clans have issued public statements rejecting cooperation with the Israelis or denouncing looting.

An Israeli official said that one group that Netanyahu was referring to was the so-called Popular Forces, led by Yasser Abu Shabab, a local clan leader in Gaza's southernmost city, Rafah. The official spoke on condition of anonymity because they were not authorized to talk to the media.

In recent weeks, the Abu Shabab group announced online that its fighters were helping protect shipments to the new, Israeli-backed food distribution centers run by the Gaza Humanitarian Foundation in the Rafah area. But some Palestinians say the group has also been involved in attacking and looting aid convoys.

Netanyahu did not specify what support Israel was giving to the clans, or what specifically their role would be. His announcement came hours after a political opponent criticized him for arming unofficial groups of Palestinians in Gaza.

In a video posted to his X account, Netanyahu said the government made the move on the advice of "security officials," in order to save lives of Israeli soldiers.

Though it was known in southern Gaza throughout the war, the Abu Shabab group emerged publicly the past month, posting pictures of its armed members, with helmets, flak jackets and automatic weapons. It declared itself a "nationalist force" protecting aid.

The Abu Shabab family renounced Yasser over his connections with the Israeli military in a recent statement, saying he and anyone who joined his group "are no longer linked" to the family.

The group's media office said in response to emailed questions from the Associated Press that it operates in Israeli military-controlled areas for a "purely humanitarian" reason.

It described its ties with the Israel military as "humanitarian communication to facilitate the introduction of aid and ensure that it is not intercepted."

"We are not proxies for anyone," it said. "We have not received any military or logistical support from any foreign party."

It said it has "secured the surroundings" of GHF centers in Rafah but was not involved in distribution of food.

It rejected accusations that the group had looted aid, calling them "exaggerations" and part of a "smear campaign." But it also said, "our popular forces led by Yasser Abu Shabab only took the minimum amount of food and water necessary to secure their elements in the field," without elaborating how, and from whom, they took the aid.

Abu Shabab and around 100 fighters have been active in eastern parts of Rafah and Khan Younis, areas under Israeli military control, according to Nahed Sheheiber, head of the private transportation union in Gaza that provides trucks and drivers for aid groups. He said they used to attack aid trucks driving on a military-designated route leading from the Kerem Shalom crossing with Israel, the main entry point for aid.

"Our trucks were attacked many times by the Abu Shabab gang and the occupation forces stood idle. They did nothing," Sheheiber said, referring to the Israeli military,

"The one who has looted aid is now the one who protects aid," he said sarcastically.

An aid worker in Gaza said humanitarian groups tried last year to negotiate with Abu Shabab and other influential families to end their looting of convoys. Though they agreed, they soon reverted to hijacking trucks, the aid worker said, speaking on condition of anonymity because he was not authorized to talk the media.

The aid worker said he saw Abu Shabab's men operating in Israeli-controlled areas near the military-held Morag Corridor in southern Gaza in late May. They were wearing new uniforms and carried what appeared to be new weapons, he said.

Jonathan Whittall, head of the U.N. humanitarian office OCHA for the occupied Palestinian territory, said Thursday that "criminal gangs operating under the watch of Israeli forces near Kerem Shalom would systematically attack and loot aid convoys. .... These gangs have by far been the biggest cause of aid loss in Gaza."

The war between Israel and Hamas erupted on Oct. 7, 2023, when Hamas-linked militants stormed into southern Israel, killing some 1,200 people and taking 251 others hostage.

Israel responded with an offensive that has decimated Gaza, displaced nearly all of its 2.3 million people and caused a humanitarian crisis that has left the territory on the brink of famine.

Gaza's Health Ministry says over 54,000 Palestinians have been killed, more than half of them women and children. The ministry, which is led by medical professionals but reports to the Hamas-run government, does not distinguish between civilians and combatants in its tally.

Hamas is still holding 56 hostages. Around a third are believed to be alive, though many fear they are in grave danger the longer the war goes on.