When Hamas militants staged their 7 October 2023 attack on Israel, they took 251 hostages into Gaza. Some were already dead.
Today, mediators announced that Israel and Hamas had reached a deal for a ceasefire and exchange of hostages and prisoners that will take effect on 19 January.
For Hamas, which rules Gaza, the hostages were key bargaining chips in the negotiations with Israel to secure a truce and the release of Palestinian prisoners.
Here's what we know about the hostages still held in Gaza.
48 men, 10 women, two children
Of the 251 hostages seized by militants on 7 October 2023, 117 have been freed, most of them women, children and foreign workers.
Most were released during a week-long truce in November 2023 in exchange for 240 Palestinian prisoners held in Israeli jails.
Israel believes 60 hostages still held in Gaza are alive, while 34 have been declared dead by the army.
The military has repatriated the bodies of 40 hostages who either died in Gaza or were killed on 7 October 2023 and taken to the territory.
The last of these were Youssef, 53, and his son Hamza al-Zayadna, 22, Israeli Arab Bedouins (Muslim Arab citizens of Israel) taken from the Holit kibbutz where they were harvesting olives.
Israel's army said on 2 December that one of its soldiers, Captain Omer Maxim Neutra, 21, was killed in Hamas's attack on 7 October 2023 and that his body has been held in Gaza since then.
Of the 60 thought to be alive, 53 are Israelis, though some of them have more than one nationality - another six are Thai and one is Nepalese.
Forty-eight are men and ten are women. A further ten are military personnel and two are children.
The youngest hostage, Kfir Bibas, was just eight-and-a-half-months old when he was kidnapped. His brother Ariel was four years old when he was taken to Gaza.
Hamas has said the two children are dead, but Israel has not confirmed this.
No proof of life sparks uncertainty
Since the last truce ended on 1 December 2023, seven other hostages have been freed alive, all during Israeli military operations.
Hamas has announced on several occasions the deaths of hostages that Israel has not confirmed, leaving families in agonising limbo.
Prime Minister Benjamin Netanyahu said in November that Israel was offering a reward of $5m (€4.8m) to anybody who brings out a hostage held in Gaza.
With no proof of life, it remains uncertain whether the 60 are all still alive.
Hamas's armed wing said on 23 November that an Israeli woman taken hostage during the October 2023 attack had been killed in a combat zone in northern Gaza. The Israeli military has said it is investigating.
Among the few proofs of life, Hamas and Islamic Jihad recently published videos with Matan Zangauker, 25, Edan Alexander, 20, Sacha Trupanov, 29, and Liri Albag, 19.
Bodies taken to Gaza after 7 October attack
On 7 October 2023, Hamas militants took several dead captives back into Gaza with them, including Omer Neutra, one of 11 Israeli soldiers.
At least 30 other hostages have died in the territory since the start of the war.
Three were killed in error by the Israeli army on 15 December 2023. They were Yotam Haim, 28, Samer El-Talalqa, 25, and Alon Shamriz, 26.
The Israeli army accuses Hamas of executing six others in August - Hersh Goldberg-Polin, Carmel Gat, Eden Yerushalmi, Alexander Lobonov, Almog Sarusi and Ori Danino.
They were found dead by soldiers in a tunnel in Rafah, southern Gaza.
Nir Oz kibbutz and Supernova music festival survivors
Most of the hostages believed alive were taken during the attacks on the Nir Oz kibbutz and the Supernova music festival.
At Nir Oz, of the at least 76 hostages taken on 7 October, 40 were released alive. Another 20 are still in Gaza and believed to be alive. The remaining 16 are dead.
Sixteen people abducted from the festival are thought to be alive and still held in Gaza.
Only nine of at least 43 hostages taken from the Supernova festival have been released.
Families separated and splintered
On the day of the attack in 2023, whole families were taken to Gaza. For some of their members, the November 2023 truce brought relief but also the heartache of leaving loved ones behind.
French-Israeli children Eitan, Erez and Sahar were freed but their fathers Ohad Yahalomi and Ofer Kalderon are still held.
