Palestinian boys look on at the site of an Israeli strike on a house, in Jabalia, northern Gaza Strip, on Tuesday. Reuters
Israeli forces killed at least 55 Palestinians in airstrikes in Gaza on Tuesday, local medics said, continuing to bombard the enclave despite mounting international pressure to halt military operations and allow unimpeded deliveries of aid.
The war, now in its 20th month, has left Gaza in ruins and its population facing a worsening hunger crisis. It has strained Israel's relations with much of the world and those with its closest ally, the United States, now appear to be wavering.
The United Nations said no humanitarian aid had been distributed yet in Gaza, although Israel eased its 11-week-old blockade on Monday.
"Israeli authorities are requiring us to offload supplies on the Palestinian side of Kerem Shalom crossing and reload them separately once they secure our team's access from inside Gaza," said UN spokesperson Stephane Dujarric.
He said four trucks of baby food were dropped off on the Palestinian side of the border on Monday, and that a few dozen trucks of flour, medicine, nutrition supplies and other basic items entered Gaza on Tuesday.
Israel's military said 93 UN aid trucks entered Gaza on Tuesday via Kerem Shalom "after a thorough security inspection".
Mourners attend the funeral of Palestinians killed in Israeli strikes, at Al-Aqsa Martyrs hospital, in Deir Al-Balah in the central Gaza Strip, on Tuesday. Reuters
Indirect ceasefire talks between Israel and Palestinian group Hamas in Qatar appeared to falter again, with Israeli Prime Minister Benjamin Netanyahu saying he had decided to bring back the senior negotiating team from Doha for consultations.
Hamas accused Netanyahu of entering the talks in bad faith, pretending to participate in a bid to mislead global public opinion. "No real negotiations have taken place since last Saturday," the Palestinian Islamist group said in a statement.
Israel's military chief said during a Gaza field tour that the army would expand its operations against Hamas, capture additional territory and "clear and destroy the terrorist infrastructure until (Hamas) is defeated".
Israel conducted further airstrikes on Tuesday across the densely populated enclave and medics said the sites hit included two homes where children were among the 18 dead, and a school housing displaced families.
Israel's military, which on Monday warned those in the southern Gaza city of Khan Younis to evacuate to the coast as it prepared for an "unprecedented attack", had no comment. Israel says Hamas uses civilian buildings for cover; Hamas denies this.
In Gaza City, Reuters footage showed men, women and children sifting through the rubble of the Daraj neighbourhood school where they had been sheltering, and where charred pieces of clothing and a red teddy bear lay among scattered belongings.
At nearby Al-Ahli Hospital, men said prayers over bodies wrapped in white shrouds, before carrying them to their graves.
"What is our fault? What is the fault of children? What is the fault of the women we found on the stairs with their hair and clothes torn and burned?" said Omar Ahel, who had been sheltering at the school. "By God, this is injustice."
Israeli strikes have killed more than 500 people in the past nine days as the military campaign has intensified, Gaza medics say.