UNRWA, the main U.N. agency aiding Palestinians, said its drivers were forced at gunpoint to unload supplies in what it called one of the worst such incidents of the war.

Israel has dramatically escalated its bombardment of Lebanon since September, vowing to severely weaken Hezbollah, which has been firing rockets and drones at Israel since it launched its air and ground assault on Gaza over a year ago.

More than 100 trucks have been looted in one of the largest raids on aid deliveries to the Gaza Strip in recent months. The head of the United Nations Relief and Works Agency for Palestine Refugees (UNRWA),