Israel has announced plans to demolish the remaining underground tunnels in Gaza operated by Hamas immediately after the scheduled release of hostages, a move approved by the United States. The tunnels, which extend under the border into Israeli territory, have been used by Hamas to launch surprise attacks. Defense Minister Israel Katz said the military has been instructed to prepare for the operation, which will follow the current U.S.-supported ceasefire in Gaza. The ceasefire, initiated three days ago, has already paved the way for the release of 48 Israeli hostages and the reciprocal freeing of 250 prisoners and 1,700 Palestinians detained by Israel. Hamas has agreed to the first phase of the U.S. plan but has not yet committed to full disarmament, citing complications in the second phase.