U.S. President Donald Trump gave Hamas three to four days on Tuesday to accept a U.S.-backed peace plan for Gaza, warning of "a very sad end" if the group rejected the proposal that he said was close to ending the two-year-old conflict.

Speaking to reporters in Washington, Trump said Israeli and Arab leaders had already endorsed the plan and that "we're just waiting for Hamas" to make its decision. He gave the group "three or four days" to respond. "Hamas is either going to be doing it or not, and if it's not, it's going to be a very sad end," said Trump.

Mediators Qatar and Egypt shared the 20-point plan with Hamas late on Monday after Israeli Prime Minister Benjamin Netanyahu had appeared alongside Trump at the White House and endorsed the document, saying it satisfied Israel's aims.

Hamas voices concerns

Hamas was not involved in the negotiations that led to the proposal, which calls on the Islamist militant group to disarm, a demand it has previously rejected. However, an official briefed on the talks told Reuters that the group "would review it in good faith and provide a response."

The plan specifies an immediate ceasefire, an exchange of all hostages held by Hamas for Palestinian prisoners held by Israel, a staged Israeli withdrawal from Gaza, the disarmament of Hamas and the introduction of a transitional government led by an international body.

A source close to Hamas told Reuters the plan was "completely biased to Israel" and imposed "impossible conditions" that aimed to eliminate the group.

One of Hamas's main conditions since the outset of the conflict has been a full Israeli withdrawal from Gaza in return for the release of the remaining hostages.

"What Trump has proposed is the full adoption of all Israeli conditions, which do not grant the Palestinian people or the residents of the Gaza Strip any legitimate rights," a Palestinian official, who asked not to be named, told Reuters.

However, Hamas faces considerable pressure to accept the plan, with the foreign ministers of Saudi Arabia, Jordan, United Arab Emirates, Qatar and Egypt all welcoming the initiative.

Türkiye's head of intelligence will join Qatari and Egyptian mediators in Doha to discuss the peace proposal later on Tuesday, a spokesperson for Qatar's foreign ministry said. Türkiye has not previously been involved as a key mediator during efforts over the last two years to bring peace to Gaza. It was unclear if Hamas officials would join Tuesday's meeting.

Gaza in constant need of humanitarian aid

UN relief chief Tom Fletcher recently welcomed U.S. President Donald Trump's Gaza peace proposal for opening new possibilities to deliver large-scale, desperately needed life-saving aid.

The UN Office for the Coordination of Humanitarian Affairs (OCHA), which Fletcher heads, warned that areas across the Gaza Strip, especially Gaza City, continue to come under heavy Israeli bombardment.

The UN Human Rights Office said that between last Wednesday and last Sunday, Israeli strikes intensified in the northwestern part of Deir al-Balah, with at least 89 Palestinians reportedly killed in at least a dozen separate incidents.

The UN relief agency for Palestine refugees reported that in Gaza City, its teams operate 18 shelters for more than 4,000 people, although 28 others remain inaccessible or had to be evacuated. Only one of the agency's five medical points in Gaza City remains operational, said OCHA.

In Gaza itself, some Palestinians hailed Trump's peace plan, saying it could end the bombardment and deaths, but they wondered whether it would end Israel's control of the enclave.

"We want the war to end, but we want the occupation army that killed tens of thousands of us to get out and leave us alone," said Salah Abu Amr, a 60-year-old father of six from Gaza City, Reuters reported.

(With input from agencies)