Netanyahu adviser says Gaza cease-fire could happen 'tomorrow' if Hamas releases hostages

Palestinians look at a destroyed residential building following an Israeli strike in the Nusseirat refugee camp in the central Gaza Strip on Saturday, Dec. 23. (AP Photo/Adel Hana)

Mark Regev, a senior adviser to Israeli Prime Minister Benjamin Netanyahu, told Sky News on Saturday that a cease-fire could be implemented "tomorrow" in the Gaza Strip if Hamas agrees to release the more than 100 remaining hostages in its captivity.

"We're ready for another humanitarian pause as we did in November," Regev reportedly added.

About 129 hostages are believed to remain in the Gaza Strip.

Gadi Haggai, a 73-year-old Israeli-American taken captive by Hamas, has become the first American hostage to have died in the war. His death was announced Friday.