[Source: Reuters]

Palestinian officials said an Israeli airstrike in southern Gaza Strip killed dozens while advancing tanks in Gaza City forced residents to flee under fire as Israel on Tuesday stepped up an offensive that Hamas warned could jeopardise ceasefire talks.

The airstrike hit the tents of displaced families outside a school in the town of Abassan east of Khan Younis in southern Gaza, killing at least 29, most of them were women and children, Palestinian medical officials said.

The Israeli military said it was looking into the report.

Ismail Al-Thawabta, director of the Hamas-run Gaza government media office, said Israeli strikes on central Gaza areas killed 60 Palestinians and wounded dozens of others on Tuesday.

Residents said Israeli tanks that pushed into the Tel Al-Hawa, Shejaia and Sabra neighborhoods of Gaza City shelled roads and buildings, forcing them to flee their homes. This was followed by Israeli military orders to evacuate several districts in eastern and western Gaza City posted on social media, which included these neighbourhoods.

On Gaza City’s front lines, the armed wings of Hamas and its ally Islamic Jihad said their fighters battled Israeli forces with machine guns, mortar fire and anti-tank missiles and killed and wounded Israeli soldiers.

Israel’s military did not comment on casualties but said its soldiers were engaged in close-quarter combat with militants, had taken more than 150 fighters out of action in the last week and destroyed booby-trapped buildings and explosives.

The latest fighting has unfolded as senior U.S. officials were in the region to push for a ceasefire after Hamas made concessions last week. But Israel’s renewed campaign threatened talks at a crucial time and could bring negotiations “back to square one”, Hamas quoted leader Ismail Haniyeh as saying.

Video on social media showed families packed onto donkey carts and in the backs of trucks piled with mattresses and other belongings making their way through Gaza City’s streets to flee areas under Israeli evacuation orders.

She said it was the seventh time her family had fled their house in Gaza City, in the north of the enclave and one of Israel’s first targets at the start of the war in October.

The Palestinian Red Crescent said all of its medical clinics were out of service in Gaza City due to the Israeli evacuation orders that have driven thousands of people westward towards the Mediterranean and to the south.

Nine months of war and displacement have caused a hunger crisis, and the recent deaths of several more children from malnutrition in the Gaza Strip indicate that famine has spread throughout the coastal enclave, a group of independent human rights experts mandated by the United Nations said.

In a Khan Younis hospital, Palestinian woman Ghaneyma Joma told Reuters she feared her son would starve to death.