Iran Press/ West Asia: Fierce fighting has left thousands dead on both sides since Hamas launched a surprise attack on Saturday, spurring Israel's reprisal bombing campaign.
"Over 263,934 people in Gaza are believed to have fled their homes," said UN humanitarian agency OCHA said in an update Tuesday, warning that "this number is expected to rise further".
It said that around 3,000 people had been displaced "due to previous escalations", prior to Saturday.
More than 1,000 people have been killed in Israel in the worst attack in the country's 75-year history, while Gaza officials have reported 900 people killed since the air strikes began.
Satellite image of the destruction in Gaza after the Israeli attacks
The bombing campaign has destroyed more than 1,000 housing units, and 560 have been so severely damaged they are uninhabitable, OCHA said, citing Palestinian authorities.
Among the displaced, nearly 175,500 people sought shelter in 88 schools run by the UN agency supporting Palestinian refugees, UNRWA, it said.
More than 14,500 others had fled to 12 government schools, while close to 74,000 were estimated to be staying with relatives and neighbors or seeking shelters in churches and other facilities.
The number of displaced people inside of Gaza "represents the highest number of people displaced since the 50-day escalation of hostilities in 2014," it said.
Satellite image of the destruction in Gaza after the Israeli attacks
"Meeting basic needs is becoming increasingly challenging for those who have not been displaced," OCHA warned.
Israel has imposed what it called a "complete siege" on the already blockaded Gaza Strip, cutting off food, water, fuel, and electricity -- a move that UN Secretary-General Antonio Guterres warned would worsen an already dire humanitarian situation.
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