An Israeli group representing families of hostages held by Hamas says the remains of all four hostages returned early Thursday have been identified. Hamas says it is ready to negotiate the next phase of the cease-fire.

The latest agreement would complete both sides’ obligations of the first phase of the ceasefire — during which Hamas is returning 33 hostages, including eight bodies — in exchange for nearly 2,000 Palestinian prisoners.

Hamas is set to hand over the bodies of four hostages late Wednesday night in exchange for Israel’s release of hundreds of Palestinian prisoners, just days before the first phase of the ceasefire between the warring parties was to expire.