Thirteen Israeli soldiers have been killed in the ground offensive in Gaza as artillery strikes continue to target the sites of alleged rocket attacks.
The Israeli military said the soldiers, from Golani brigade, died during the offensive on Sunday, including seven who were killed after their armoured personnel carrier was hit by an anti-tank missile.
At least 87 Palestinian people are also thought to have been killed during the day's fighting, the majority of them in Shaja'iya in northeast Gaza.
Eight were killed in an air strike on the Rimal neighbourhood of Gaza City, while a 15-year-old girl was killed in Beit Lahiya.
Thousands of Palestinians fled the fighting as the artillery bombardment began.
An injured Palestinian woman at al-Shifa hospital in Gaza City
Sky's Sherine Tadros, reporting from Shaja'iya, said people fleeing the area described it as a "massacre".
She said: "We have seen hundreds upon hundreds of people leaving and they are not carrying bags packed with clothes, they are not carrying anything. They are literally running for their lives.
"They are leaving this area but of course there is nowhere safe here. You expect to see all these people flee across a border, but they can't cross a border. Gaza is completely locked off."
Gaza officials said 35,000 people had fled their homes on Sunday.
Israeli mobile artillery fires at targets inside Gaza
An Israeli military spokeswoman said residents in Shaja'iya were warned to evacuate the area two days ago through recorded messages.
Hamas accepted a proposal - secured by the International Committee of the Red Cross (ICRC) - for a two-hour humanitarian ceasefire on Sunday.
But an Israeli military spokesman said the ground offensive had resumed after the temporary truce was breached by Hamas fighters within an hour.
Earlier Naftali Bennett, Israeli economic minister, told Sky News Hamas was "cynically" using women and children as human shields.
Smoke rises after air strikes in Shaja'iya, northeast Gaza
"They only difference between us and Hamas in Gaza is that they are deliberately sending their women and children to stand next to missile launchers in order for them to get killed and then they cry to the world that they are being killed," he said.
"This is cynical and cowardly. Israel has all the right to defend itself."
The Palestinian leadership slammed the "massacre" in Shaja'iya, while the Arab League claimed Israel had committed "war crimes".
The Israeli military has said it has hit more than 2,500 targets in Gaza, including 1,100 rocket launchers, after nearly two weeks of fighting.
Nearly 90 people are thought to have been killed on Sunday alone
It has said around 70 militants have been killed and another 13 brought to Israel for questioning after more than 1,760 rockets were fired at Israeli cities since July 8.
UN Secretary-General Ban Ki-moon has travelled to Qatar to try to restart ceasefire efforts.
Last week, Hamas rejected an Egyptian-brokered truce - saying it would only agree if Israel and Egypt significantly eased the border blockade of Gaza.
Since the start of the fighting, more than 425 Palestinians have been killed and more than 2,600 wounded, according to the Gaza Health Ministry.
A total of 18 Israeli military personnel have been killed and two Israeli civilians have also died in rocket attacks.