The Gaza Humanitarian Foundation says two US aid workers have suffered non-life-threatening injuries in a grenade attack at a food distribution site in the Gaza Strip.
The United States and Israeli-backed GHF said in a statement that the injured workers 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," the GHF said.
The GHF, which began distributing aid in the Gaza Strip in May, employs private US military contractors tasked with providing security at their sites.
It was not immediately clear who was behind the attack.
The Israeli military, in a later statement, accused what it called "terrorist organisations" of sabotaging the distribution of aid in the Gaza Strip.
There has been an escalation in violence in the enclave as efforts continue to reach a ceasefire agreement.
Hamas on Friday reported it had responded positively to a US-brokered deal and was prepared to enter into talks.
US President Donald Trump is scheduled to meet Israeli Prime Minister Benjamin Netanyahu on Monday.
Gazan authorities reported at least 70 people have been killed in the territory by the Israeli military in the last 24 hours, including 23 near aid distribution sites.
The ministry did not specify where or how exactly they had been killed.
The Israeli military had no immediate comment on the reports.
In a statement on Friday, the military said that in the past week, troops had killed 100 militants in the Gaza Strip and claimed that it had "operational control" over 65 per cent of the enclave after an offensive against Hamas fighters in the north.
The Hamas-run interior ministry on Thursday warned residents of the coastal enclave not to assist the GHF, saying deadly incidents near its food distribution sites endangered hungry Gazans.
The GHF has said it has delivered more than 52 million meals to Palestinians in five weeks.
The GHF bypasses traditional aid channels, including the United Nations, which says the US-based organisation is neither impartial nor neutral.
Since Israel lifted an 11-week aid blockade on the Gaza Strip on May 19, the UN says more than 400 Palestinians have been killed while seeking aid handouts.
A senior UN official said last week that the majority of people killed were trying to reach aid distribution sites of the GHF.
The latest bloodshed in the decades-old Israeli-Palestinian conflict was triggered in October 2023 when Hamas attacked southern Israel, killing about 1200 people and taking 251 hostages, according to Israeli tallies.
Gaza's health ministry says Israel's retaliatory military assault on the enclave has killed more than 57,000 Palestinians.
It has also caused a hunger crisis, internally displaced the strip's entire population and prompted accusations of genocide and war crimes.
Israel denies the accusations.