Twenty-four hostages have been released by Hamas and are now back in Israel.
Qatar, which has been mediating between Israel and Hamas, says among them are 13 Israelis, 10 Thais and one Filipino.
The Israeli hostages include four children aged two, four, six and nine - as well as an 85-year-old woman.
Palestinian detainees held by Israel have now been released to the West Bank as part of the deal.
The group is made up of 24 women and 15 teenage boys - the majority were being held in pre-trial detention.
Under the terms of the deal, a total of 50 Israeli hostages and 150 Palestinian detainees are meant to be released over four days during a temporary ceasefire.
More aid is also being allowed into Gaza, with 137 lorries carrying medical supplies, fuel and food entered today from Egypt.
Hamas's attack on 7th October has killed 1,200 people, with about 240 taken hostage.
Since then, Gaza's Hamas-run health ministry says more than 14,000 people have been killed in Israel's retaliatory campaign.
Source: BBC
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