Israel has pounded Gaza with scores of air strikes, killing 10 Palestinians, mostly women and children, and bringing down an 12-storey apartment building as Egypt called for new truce talks.
Since a previous round of frantic Egyptian diplomacy collapsed last Tuesday, shattering nine days of calm, 86 Palestinians and a four-year-old Israeli boy have been killed in the violence.
Israel on Saturday sent text messages, voice mails and leaflets warning Palestinians that "every house from which militant activity is carried out, will be targeted" and to stay away from "terrorists".
Israel has vowed no let-up until it can guarantee the safety of its civilians, while Hamas insists that Israel must end its eight-year blockade of the territory as part of any truce.
At least 2103 Palestinians and 68 people on the Israeli side, all but four of them soldiers, have been killed since July 8. The UN says 70 per cent of the Palestinians who have died were civilians.
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Israel said it had carried out 55 air strikes over Gaza on Saturday and that around 64 rockets and mortar rounds from Gaza hit Israel, with another 14 intercepted, including one over Tel Aviv.
An Israeli air strike levelled an apartment building in the heart of Gaza City late Saturday, wounding at least 18 people, 10 of them children, emergency services said.
Residents in the 11-storey building were called 10 minutes before the attack and told to evacuate, after which at least two missiles slammed into the complex, levelling it totally, witnesses said.
An Israeli army spokeswoman told AFP a Hamas military operations room had been located in the building.
