UN aid deliveries to Gaza have been suspended again due to shortages of fuel and a communications shutdown, deepening the misery of thousands of hungry and homeless Palestinians as Israeli troops battle Hamas militants in the enclave.
The United Nations' World Food Programme (WFP) said civilians faced the "immediate possibility of starvation" due to the lack of food supplies.
Palestinian news agency WAFA said a number of Palestinians were killed and others injured in an Israeli strike that hit a group of displaced people near the Rafah border crossing between the Gaza Strip and Egypt - the transit point for aid.
Al Jazeera TV said that nine people were killed in the strike. There was no immediate comment from Israel on the reported strike.
In other developments, Israel said its troops had found a tunnel shaft used by Hamas at Al Shifa hospital in the north of the Gaza Strip.
The hospital, packed with patients and displaced people and struggling to keep operating, has been a major focus of global concern this week.
Israel says Hamas has stored weapons and ammunition and is holding hostages in a network of tunnels under hospitals such as Shifa, using patients and people taking shelter there as human shields. Hamas denies this.
With the war about to enter its seventh week, there is no sign of any let-up despite international calls for a ceasefire or at least for humanitarian pauses.
The conflict was triggered by a cross-border raid by Hamas militants on October 7 that killed about 1200 Israelis, mostly civilians, in the deadliest day in the state's 75-year-history.
More than 11,500 Palestinians, at least 4700 of them children, have been killed in Israel's retaliatory military assault on Hamas-ruled Gaza, according to the Palestinian health ministry.
Israel has vowed to wipe out the militant group. Whole neighbourhoods of Gaza have been flattened in air and artillery strikes, hundreds of thousands of people have been forced to flee their homes, and the humanitarian situation is catastrophic, aid agencies say.
The United Nations said there would be no cross-border aid operation on Friday due to fuel shortages and a communication shutdown.
For a second consecutive day on Thursday no aid trucks arrived in Gaza due to lack of fuel for distributing relief.
WFP executive director Cindy McCain said nearly the entire population was in desperate need of food assistance.
"Supplies of food and water are practically non-existent in Gaza and only a fraction of what is needed is arriving through the borders," she said in a statement.
"With winter fast approaching, unsafe and overcrowded shelters, and the lack of clean water, civilians are facing the immediate possibility of starvation."
The Israeli military's chief of staff said Israel was close to destroying Hamas' military system in northern Gaza and there were signs the army was taking its campaign to other parts of the enclave of 2.3 million people.
Israel accused Hamas of preventing people heading to the south of the Gaza Strip, which the militant group denied.
The army released a video it said showed a tunnel entrance in an outdoor area of Al Shifa, Gaza's biggest hospital.
The video, which Reuters could not immediately verify, showed a deep hole in the ground, littered with and surrounded by concrete and wood rubble and sand.
The army said its troops also found a vehicle in the hospital containing a large number of weapons.
Hamas said on Thursday that claims by the United States that the group used Shifa for military purposes was "a repetition of a blatantly false narrative".
Israeli officials had said Hamas held some of the 240 hostages taken by gunmen on October 7 in the hospital complex.
On Friday, the Israeli military said soldiers retrieved the body of a female soldier who had been held captive, in a building near Shifa.
The military had confirmed her death on Tuesday after Hamas issued a video of her alive followed by images of what it said was her body after she was killed in an Israeli strike.
On Thursday, troops recovered the body of another woman hostage, also in a building near Shifa.
