The U.S. and Egyptian presidents are chairing a gathering of world leaders dubbed "the Summit for Peace" to support ending the two-year war in Gaza after a breakthrough ceasefire deal.

President Donald Trump arrived in Israel on Monday to celebrate the U.S.-brokered ceasefire and hostage deal between Israel and Hamas, an agreement that he declared had effectively ended the war and opened the door to building a durable peace in the Middle East.

As he disembarked from Air Force One, a convoy of vehicles carried into Israel the first hostages released by Hamas as part of the deal.

Hamas released all 20 remaining living hostages held in Gaza on Monday, while Israel began releasing hundreds of Palestinian prisoners as part of a ceasefire pausing two years of war that pummeled the territory, killed tens of thousands of Palestinians, and had left scores of captives in militant hands.

Cheering crowds greeted buses of prisoners in the West Bank, while families and friends of the hostages gathered in a square in Tel Aviv, Israel, cried out with joy and relief as news arrived that the captives were free.

U.S. President Donald Trump and his Egyptian counterpart Abdel Fattah al-Sisi will on Monday chair a Gaza peace summit in Sharm el-Sheikh, also attended by world leaders including the U.N. chief.

Three Qatari diplomats were killed and two injured in a car crash on Sunday near the Egyptian town of Sharm el-Sheikh, according to the Gulf state's embassy.

A Hamas source close to the group's negotiating committee told AFP on Sunday that it will not participate in post-war Gaza governance, as world leaders prepare to converge on Egypt for a Gaza peace summit.

Israel declared a ceasefire in Gaza and began to pull back its forces on Friday, as tens of thousands of exhausted Palestinians made their way back to their devastated homes.

U.S. Defense Secretary Pete Hegseth announced Friday that Qatar will be allowed to build an air force facility at Mountain Home Air Base in Idaho that will house F-15 fighter jets and pilots.

The announcement comes soon after President Donald Trump signed an executive order vowing to defend the Gulf Arab state against attacks, following Israeli air strikes targeting Hamas leaders in the Qatari capital Doha.

Thousands of Gazans began heading north in the territory after the Israeli military announced that a ceasefire had come into effect on Friday, AFP footage showed.

A ceasefire agreement between Israel and Hamas for the Gaza Strip came into effect at noon local time, the Israeli military said Friday, adding that troops were withdrawing to agreed-upon deployment lines. The announcement came hours after Israel's Cabinet approved President Donald Trump's plan for a ceasefire in the Gaza Strip, the release of the remaining hostages and of Palestinian prisoners.

Palestinians reported heavy shelling in parts of Gaza throughout Friday morning.