Many of the people treated for injuries following a rush on an aid convoy in Gaza on Thursday suffered bullet wounds, the UN has said.
UN observers visited Gaza City's al-Shifa Hospital and saw
some of the roughly 200 people still being treated.
Hamas has accused Israel of firing at civilians, but Israel
said there was a "stampede" after its troops fired warning shots.
Leaders from around the world have called for a fullinvestigation.
The incident unfolded after hundreds of people descended on
an aid convoy as it moved along a coastal road, accompanied by the Israeli military,
in the early hours of Thursday morning.
The World Food Programme has warned that a famine is
imminent in northern Gaza, which has received very little aid in recent weeks,
and where an estimated 300,000 people are living with little food or clean water.
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In footage from the scene, volleys of gunfire can be heard
and people are seen scrambling over lorries and ducking behind the vehicles.
Gaza's Hamas-run health ministry has said that at least 112
people were killed in the incident and another 760 were injured.
In a statement on social media, Rear Adm Daniel Hagari,
spokesman for the Israel Defense Forces (IDF), said, "Dozens of Gazans
were injured as a result of pushing and trampling."
The IDF's Lt Col Peter Lerner also told the UK's Channel 4
News that a "mob stormed the convoy" and that Israeli troops
"cautiously [tried] to disperse the mob with a few warning shots".
Mark Regev, special adviser to the Israeli prime minister,
had earlier told CNN that Israel had not been involved directly in any way and
that the gunfire had come from "Palestinian armed groups", though he
did not provide evidence.
Giorgios Petropoulos, head of the Gaza sub-office of the UN
Co-ordinator for Humanitarian Affairs (OCHA) told the BBC he and a team sent to
al-Shifa hospital found a large number of people with bullet wounds.
He said all but a handful of the 70 to 80 patients in the
emergency room he visited had been injured during the convoy incident.
In addition to those with bullet wounds, he said doctors had
treated many who had fallen down or been trampled - but he was unable to say
with certainty which group was larger.
Mr Petropoulos said those with bullet injuries had suffered
wounds in the upper and lower body. One patient told him he had been shot in
the chest and who had walked to Shifa to get treatment.
"He said they (Israeli troops) usually shoot in the
air. This time, they shot into the thickest part of the crowd," Mr
Petropoulos said.
But, Mr Petropoulos emphasised UN personnel had not been
present during the incident making it very difficult to know precisely what
happened.
Dr Mohamed Salha, interim hospital manager at al-Awda
hospital, previously told the BBC that they had received 176 of the injured, of
whom 142 had bullet wounds.
He added that the others had suffered broken limbs.
Responding to the incident, UK Foreign Secretary LordCameron called the deaths "horrific" and said there "must be an
urgent investigation and accountability".
"This must not happen again," he said.
He added that the incident could not be separated from the
"inadequate aid supplies" entering Gaza and called the current levels
"simply unacceptable".
US President Joe Biden announced that the US would begin
dropping aid into Gaza by air, saying: "Innocent people got caught in a
terrible war, unable to feed their families. We need to do more, and the United
States will do more."
Israel military launched a large-scale air and ground
campaign to destroy Hamas - which is proscribed as a terrorist organisation by
Israel, the UK and others - after its gunmen killed about 1,200 people in
southern Israel on 7 October and took 253 back to Gaza as hostages.