WASHINGTON — President Donald Trump said Tuesday that Israel has agreed on terms for a 60-day ceasefire in Gaza and warned Hamas to accept the deal before conditions worsen.

Trump announced the development as he prepares to host Israeli Prime Minister Benjamin Netanyahu for talks at the White House on Monday. The U.S. leader has been increasing pressure on the Israeli government and Hamas to broker a ceasefire and hostage agreement and bring about an end to the war in Gaza.

“My Representatives had a long and productive meeting with the Israelis today on Gaza. Israel has agreed to the necessary conditions to finalize the 60 Day CEASEFIRE, during which time we will work with all parties to end the War,” Trump wrote, saying the Qataris and Egyptians would deliver the final proposal.

Trump’s promise that it was his best and final offer may find a skeptical audience with Hamas. Even before the expiration of the war’s longest ceasefire in March, Trump has repeatedly issued dramatic ultimatums to pressure Hamas to agree to longer pauses in the fighting that would see the release of more hostages and a return of more aid to Gaza’s civilian populace.

Still, Trump views the current moment as a potential turning point in the brutal conflict that has left more than 56,000 dead in the Palestinian territory. The Gaza Health Ministry does not differentiate between civilians and combatants in its death count.

Hamas is still capable of landing fatal blows to Israeli forces. But U.S. officials believe that the group’s been significantly diminished as its centralized command and control capabilities have deteriorated over the course of the nearly 21-month conflict. Meanwhile, Hamas’ chief backer Iran was badly battered last month by 12 days of strikes by Israel and the United States on Tehran’s key nuclear facilities..

Talks between Israel and Hamas have repeatedly faltered over a major sticking point — whether the war should end as part of any ceasefire agreement. About 50 hostages remain captive in Gaza, with less than half believed to be alive.

Hamas says it is willing to free all the hostages in exchange for a full withdrawal of Israeli troops and an end to the war in Gaza. Israel rejects that offer, saying it will agree to end the war if Hamas surrenders, disarms and goes into exile, something that the group refuses.

The announcement by Trump came as over 150 international charities and humanitarian groups called Tuesday for disbanding a controversial Israeli- and U.S.-backed system to distribute aid in Gaza because of chaos and deadly violence against Palestinians seeking food at its sites.

The joint statement by groups including Oxfam, Save the Children and Amnesty International followed the killings of at least 10 Palestinians who were seeking desperately needed food, witnesses and health officials said. Meanwhile, Israeli airstrikes killed at least 37 in southern Gaza’s Khan Younis, according to Nasser Hospital.