Hamas said Thursday it was ready to negotiate the the next phase of the ceasefire in the Gaza Strip, after a swap in which it handed over what it said were the remains of four hostages in exchange for the release of more than 600 Palestinian prisoners held by Israel.

It was the final such exchange the two sides agreed to as part of a truce that's set to end this weekend. Negotiations over a second phase, in which Hamas would release dozens of remaining hostages in exchange for more prisoners and a lasting ceasefire, have not yet begun.