Hamas handed over the bodies on Thursday of Israeli infant Kfir Bibas and his four-year-old brother Ariel, the two youngest captives taken in the October 7, 2023 attack.
The Palestinian group released the bodies of the two boys and their mother Shiri Bibas, along with that of a fourth hostage, Oded Lifschitz, under the Gaza ceasefire agreement reached last month with the backing of the United States and the mediation of Qatar and Egypt.
Red Cross vehicles drove away from the handover site in the Gaza Strip with four black coffins that had been placed on a stage. Each of the caskets had a small picture of the hostages.
Prime Minister Benjamin Netanyahu said in a brief video statement that Thursday would be "a very difficult day for the state of Israel. An upsetting day, a day of grief."
Kfir Bibas was nine months old when the Bibas family, including their father Yarden, was abducted at Kibbutz Nir Oz, one of a string of communities near Gaza that were overrun by Hamas-led attackers from Gaza on October 7.
Hamas said in November 2023 that the boys and their mother had been killed in an Israeli airstrike but their deaths were never confirmed by Israeli authorities and even at the last minute, some refused to accept they were dead.
At the handover site, a large poster was hung up, depicting Netanyahu as a vampire standing over images of the four hostages. "The War Criminal Netanyahu & His Nazi Army Killed Them with Missiles from Zionist Warplanes," the poster read.
Following the handover, the remains will be moved into coffins draped with the Israeli flag and an army rabbi will provide over a short ceremony. They will then be taken into Israel to the national forensic institute to be identified, a process that could take a few hours or even a few days.
Only after identification will there be a formal announcement of their deaths and a funeral.
The handover marks the first return of dead bodies during the current agreement and Israel is not expected to confirm their identities until full DNA checks have been completed.
Despite accusations on both sides of ceasefire breaches, the fragile agreement that took effect on January 19 has held up since the first in a series of exchanges of hostages in Gaza for Palestinian prisoners and detainees held by Israel.