The Israeli military confirmed that a Palestinian employee of WCK was killed in a strike, accusing the worker of being a "terrorist" who "infiltrated Israel and took part in the murderous October 7 massacre" last year.

WCK in a statement said it "had no knowledge that any individual in the vehicle had alleged ties to the October 7 Hamas attack", and did not confirm any deaths.

Earlier Saturday, Gaza civil defence agency spokesman Mahmud Bassal told AFP that five people were killed, including "three employees of World Central Kitchen", in the strike in the main southern city of Khan Yunis.

"All three men worked for WCK and they were hit while driving in a WCK jeep in Khan Yunis," Bassal said, adding that the vehicle had been "marked with its logo clearly visible".

WCK confirmed a strike had hit its workers, but added: "At this time, we are working with incomplete information and are urgently seeking more details."

The Israeli army statement said representatives from the unit responsible for overseeing humanitarian needs in Gaza had "demanded senior officials from the international community and the WCK administration to clarify the issue and order an urgent examination regarding the hiring of workers who took part in the October 7 massacre".

It also said its strike in Khan Yunis had hit "a civilian unmarked vehicle and its movement on the route was not coordinated for transporting of aid".

In April, an Israeli strike killed seven WCK staff -- an Australian, three Britons, a North American, a Palestinian and a Pole.

Israel said it had been targeting a "Hamas gunman" in that strike, but the military admitted a series of "grave mistakes" and violations of its own rules of engagement.

The UN said last week that 333 aid workers had been killed since the start of the war in October of last year, 243 of them employees of the UN agency for Palestinian refugees, UNRWA.

Palestinian militants' October 7, 2023 attack on southern Israel resulted in the deaths of 1,207 people, most of them civilians, according to an AFP tally of Israeli official figures.

Israel's retaliatory military offensive has killed 44,382 people in Gaza, according to figures from the territory's health ministry which the United Nations considers reliable.