Trump hints at 'action' if Hamas doesn't return hostage bodies

The United Nations and other aid organizations “have been able to move more freely across parts of Gaza from which Israeli forces have withdrawn,” since the first phase of the ceasefire deal went into effect, U.N. Deputy spokesperson for the Secretary General Farhan Haq said at a press briefing at U.N. headquarters in New York Tuesday.

"This improved access has allowed partners to scale up the response to the most urgent needs," Haq said.

World Health Organization teams reached Al Ahli Hospital with eight trucks of medical supplies on Monday, and their teams reached the European Hospital in Khan Younis to transfer critical medications and intensive care unit equipment to Nasser Hospital, Haq said.

"The U.N. and our humanitarian partners have also installed a solar panel for a desalination unit in Deir al Balah, as well as new telecommunications hardware to improve connectivity for affected people and humanitarian operations," Haq said.

Members of the International Committee of the Red Cross are on their way to retrieve the remains of several hostages held by Hamas in the southern Gaza Strip, according to the Israel Defense Forces.

It is unclear how many remains will be handed over.

Asked about how long it would take Hamas to disarm and if it can be guaranteed the group will do so, President Donald Trump said they would do so by force if necessary.

"If they don't disarm, we will disarm them. They know I'm not playing games. Now we did something monumental. We got the hostages back. That was the first thing we had to do," Trump said in response to a question from ABC News' Karen Travers at the White House on Tuesday.

"I spoke to Hamas and I said, you're going to disarm, right? Yes sir, we're going to disarm. That's what they told me. They will disarm or we will disarm them," Trump said.

Two more hostages whose bodies was returned to Israel on Monday have been identified. Yossi Sharabi and Daniel Peretz are the third and fourth remains to be ID'd, Kibbuz Be’eri and the Hostages and Missing Families Forum said in statements Tuesday.

Sharabi was “kidnapped alive,” on Oct. 7 and “murdered in captivity,” Kibbutz Be’eri said in a release announcing the identification.

“We miss our Yossi so deeply. He was a wonderful partner and a perfect father to Yuval, Ophir, and Oren. He was a kind-hearted man who always looked for ways to do good,” Nira Sharabi, his wife, said in the statements. “Now we can finally bring closure to the nightmare that began over two years ago and give Yossi the dignified and loving burial he deserves in the soil of Kibbutz Be'eri.”

Peretz, 22, was an Israel Defense Forces tank commander. He was stationed at Kibbutz Nahal Oz on Oct. 7, 2023. Peretz was wounded and kidnapped on Oct. 7, and after 163 days in captivity, he was declared a fallen IDF soldier, the Hostages and Missing Families Forum Headquarters said.

All four deceased hostages whose bodies were returned to Israel on Monday have now been identified.

-ABC News' Dana Savir, Jordana Miller and Anna Burd