Israel has officially notified the United Nations that it was cancelling the agreement that regulated its relations with the main UN relief organization for Palestinian refugees (UNRWA) since 1967, the country's foreign ministry said on Monday.

Last month, the Israeli parliament passed legislation banning UNRWA from operating in Israel and stopping Israeli authorities from co-operating with the organization, which provides aid and education services to millions of Palestinians in Gaza and the occupied West Bank.

Israel has long been critical of UNRWA, set up in the wake of the 1948 war that broke out at the time of the creation of the state of Israel, accusing it of anti-Israel bias and saying it perpetuates the conflict by maintaining Palestinians in a permanent refugee status.

Since the start of the Gaza war in October last year, it has also said that the organization has been deeply infiltrated by Hamas in Gaza, accusing some of its staff of taking part in the Oct. 7 attack on Israel.

The legislation has alarmed the United Nations and some of Israel's Western allies who fear it will further worsen the already dire humanitarian situation in Gaza, where Israel has been fighting Hamas militants for a year. The ban does not refer to operations in the Palestinian territories or elsewhere.

Israel's UN Ambassador Danny Danon said in a statement that despite the overwhelming evidence "we submitted to the UN highlighting how Hamas infiltrated UNRWA, the UN did nothing to address this reality."

The legislation does not directly outlaw UNRWA's operations in the West Bank and Gaza, but will severely impact its ability to work in those areas, and there has been deep alarm among aid groups and many of Israel's partners.

The Israeli foreign ministry said activity by other international organizations would be expanded and "preparations will be made to end the connection with UNRWA and to boost alternatives to UNRWA."

Attacks in northern, central Gaza

Meanwhile, Israeli airstrikes killed at least 10 Palestinians in Gaza on Monday, with seven dead in an attack on two houses in the north Gaza town of Beit Lahiya and three fatalities in a strike on a house in Nuseirat camp in the enclave's centre, medics told Reuters.

Several people were wounded in both attacks, they said, adding that Israeli forces had sent tanks into the northeast of Nuseirat camp earlier on Monday.

Israel deployed tanks into Jabalia, Beit Hanoun, and Beit Lahiya on Oct. 5, 2024, saying it intended to prevent Hamas from regrouping.

Palestinians said the new aerial and ground offensives and forced evacuations were "ethnic cleansing" aimed at emptying two northern Gaza towns and a refugee camp of their population to create buffer zones. Israel denies this, saying it is fighting Hamas militants who launch attacks from there.

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The Hamas-run Gaza government media office put the number of Palestinians killed since Oct. 5 at 1,800. It said 4,000 others were wounded.

There was no confirmation on the figure from the territory's health ministry and Israel has repeatedly accused the Hamas media office of exaggerating the figures of the dead.

Israel said its forces have killed hundreds of Palestinian gunmen and dismantled military infrastructure in Jabalia in the past month. It did not provide any evidence.

The war erupted after Hamas-led militants attacked Israel on Oct. 7, 2023, killing some 1,200 people and taking 251 hostages back to Gaza, according to Israeli tallies.

Israel's retaliatory offensives have killed more than 43,300 Palestinians, according to Gaza authorities, and reduced much of Gaza to rubble.