Since the U.S.-brokered ceasefire in Gaza began Oct. 10, Palestinian militants have released the remains of 26 hostages. But the return of the last two hostages under the agreement's terms is progressing slowly.

Hamas says it has not been able to reach all of the remains because they are buried under rubble left by Israel's two-year offensive in Gaza. Israel has accused the militants of stalling and threatened to resume military operations or withhold humanitarian aid if all remains are not returned.