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The US has said the shelling of a UN shelter in Gaza is "totally unacceptable and totally indefensible"

In its strongest criticism yet of Israel's offensive in the Palestinian territory, the US - Israel's closest ally - urged Israel to do more to protect civilian life.

A quarter of Gaza's population has been displaced by the fighting, the UN says.

Israel says its operation in Gaza is designed to defend its population from attacks by Palestinian militants.

It blames the Hamas militant group for most of the civilian deaths in Gaza, saying its fighters deliberately operate from civilian areas.

A senior Israeli official has told the BBC that the army has now "neutralised" 70-80% of Hamas' offensive tunnel network into Israel.

Israel says it will not stop its operation in Gaza until all the tunnels - which militants use to infiltrate Israeli territory - have been destroyed.


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