DEIR AL-BALAH, Gaza Strip (AP) — An Israeli strike on a five-story building sheltering displaced Palestinians in the northern Gaza Strip killed at least 60 people on Tuesday, more than half of them women and children, Gaza’s Health Ministry said.

Israel has carried out more airstrikes and waged a bigger ground operation in northern Gaza in recent weeks, saying it is focused on rooting out pockets of Hamas militants that have regrouped there after more than a year of war. But the intense fighting is raising alarm about the worsening humanitarian conditions for hundreds of thousands of Palestinians still in northern Gaza.

Concerns about not enough aid reaching Gaza were amplified Monday when Israeli lawmakers passed two laws to cut ties with the main U.N. agency distributing food, water and medicine, and to ban it from Israeli soil. Israel controls access to both Gaza and the occupied West Bank, and it was unclear how the agency known by the acronym UNRWA would continue its work in either place.

“The humanitarian operation in Gaza, if that is unraveled, that is a disaster within a series of disasters and just doesn’t bear thinking about,” said UNRWA spokesperson John Fowler. He said other U.N. agencies and international organizations distributing aid in Gaza rely on its logistics and thousands of workers.

In Lebanon, the militant group Hezbollah said Tuesday it has chosen Sheikh Naim Kassem to succeed longtime leader Hassan Nasrallah, who was killed in an Israeli airstrike last month. Hezbollah, which has fired rockets into Israel since the start of the war in Gaza, vowed to continue with Nasrallah’s policies “until victory is achieved.”

A short while later, eight Austrian soldiers serving in the U.N. peacekeeping force in southern Lebanon were reported lightly injured in a midday missile strike.

The peacekeeping force, which goes by the acronym UNIFIL, said the rocket that struck its headquarters in Lebanon was “likely” fired by Hezbollah, as it came from the north, and that it struck a vehicle workshop.

Austrian Defense Minister Klaudia Tanner “condemns this attack in the strongest terms and calls on all sides immediately to cease combat operations in the surroundings of the U.N. mission’s positions,” ministry spokesperson Michael Bauer wrote on the social network X.

Strike in northern Gaza comes as Israel wages a major operation there

The Gaza Health Ministry’s emergency service said at least 12 women and 20 children, including babies, were among the dead in Tuesday’s strike in the northern Gaza town of Beit Lahiya. A mother and her five children — some of them adults — and a second mother with six children, were among the dead, according to an initial casualty list provided by the emergency service.

The toll from the strike was announced by Dr. Marwan al-Hams, director of the field hospitals’ department at the Health Ministry. He said another 17 people are missing.

The nearby Kamal Adwan Hospital was overwhelmed by the wave of wounded people from the strike, according to its director, Dr. Hossam Abu Safiya. Israeli forces raided the medical facility over the weekend, detaining dozens of medics.

There was no immediate comment from the Israeli military regarding the strike in Beit Lahiya.

Israel’s recent operations in northern Gaza, focused in and around the Jabaliya refugee camp, have killed hundreds of people and driven tens of thousands from their homes.

The Israeli military has repeatedly struck shelters for displaced people in recent months. It says it carries out precise strikes targeting Palestinian militants and tries to avoid harming civilians, but the strikes often kill women and children.

On Tuesday, Israel said four more of its soldiers were killed in the fighting in northern Gaza, bringing the toll since the start of the operation to 16, including a colonel. The military says it has killed dozens of militants, without providing evidence, while Hamas does not publicize its losses.

Hezbollah’s new leader has vowed to keep fighting Israel

Hezbollah said in a statement that its decision-making Shura Council elected Kassem, who had been Nasrallah’s deputy leader for over three decades, as the new secretary-general.

Kassem, 71, a founding member of the militant group established following Israel’s 1982 invasion of Lebanon, had been serving as acting leader. He has given several televised speeches vowing that Hezbollah will fight on despite a string of setbacks.

Hezbollah began firing rockets into Israel, drawing retaliation, after Hamas’ surprise attack out of Gaza on Oct. 7, 2023, triggered the war there. Iran, which backs both groups, has also directly traded fire with Israel, in April and then again this month.

The tensions with Hezbollah boiled over in September, as Israel unleashed a wave of heavy airstrikes and killed Nasrallah and most of his senior commanders. Israel launched a ground invasion into Lebanon at the start of October.

Hezbollah fired dozens of rockets into northern Israel on Tuesday, killing at least one person in the northern city of Maalot-Tarshiha, authorities said.

Israeli laws targeting UN agency could further restrict aid

UNRWA and other international groups continued to express outrage Tuesday about the Israeli parliament’s decision to cut ties to the agency.

Israel says UNRWA has been infiltrated by Hamas and that the militant group siphons off aid and uses U.N. facilities to shield its activities, allegations denied by the U.N. agency.

Israeli government spokesperson David Mencer vowed that aid will continue to reach Gaza, as Israel plans to coordinate with aid organizations or other bodies within the U.N. “Ultimately, we will ensure that a more efficient replacement for UNRWA takes its role, not one which is infiltrated by the terrorist organization,” he said.

Multiple U.N. agencies rallied Tuesday around UNRWA, calling it the “backbone” of the world body’s aid activities in Gaza and other Palestinian areas. UNRWA provides education, health care and emergency aid to millions of Palestinian refugees from the 1948 war surrounding Israel’s creation and their descendants. Refugee families make up the majority of Gaza’s population.

Nearly a quarter of UNRWA’s roughly 13,000 staff are health workers who provide services like immunizations, disease surveillance, and screening for malnutrition, according to World Health Organization spokesman Tarik Jasarevic. UNRWA’s work “couldn’t be matched by any agency — including WHO,” he said.

Israel has sharply restricted aid to northern Gaza this month, prompting a warning from the United States that failure to facilitate greater humanitarian assistance could lead to a reduction in military aid.

In its attack on Israel last year, Hamas killed some 1,200 people, mostly civilians, and took around 250 as hostages. Some 100 hostages are still inside Gaza, a third of whom are believed to be dead.

Israel’s retaliatory offensive has killed over 43,000 Palestinians, according to local health authorities. Around 90% of the population of 2.3 million have been displaced from their homes, often multiple times.

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