Israel-Gaza live updates: IDF says it's discovered one of Hamas' biggest tunnels

National security adviser Jake Sullivan is in Israel, where he met Thursday with officials including Israeli Prime Minister Benjamin Netanyahu and Israeli Defense Minister Yoav Gallant.

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US national security advisor urges Israel to show restraint National security adviser Jake Sullivan was in Israel Thursday to urge Israel to show restraint in its war with Hamas as calls grow for a humanitarian ceasefire.

ABCNews.com

Netanyahu and Sullivan discussed the hostages, "the dismantling of Hamas' military capabilities" and the "elimination of Hamas," according to a readout from the Israeli prime minister's office.

The two also discussed "humanitarian aid for the non-involved population" in Gaza.

National Security Council spokesperson John Kirby said Sullivan "discussed the next phase of Israel’s military campaign, and he asked hard questions, as we have been doing, about what all that could look like."

"He did talk about possible transitioning from what we would call ‘high intensity operations,’ which is what we're seeing [Israel] do now, to lower intensity operations sometime, you know, in the near future," Kirby said, adding, “I don't want to put a timestamp on it."

Sullivan "also discussed efforts Israel is now undertaking to be more surgical and precise in their targeting and efforts that they are taking to help increase the flow of aid," Kirby said.

-ABC News’ Molly Nagle

The Israeli Defense Forces said it has withdrawn from the city of Jenin in the West Bank after a 60-hour counterterror operation, during which 60 people were arrested.

The IDF also said it destroyed some terrorist infrastructures and recovered over 50 weapons and hundreds of explosives.

Israeli President Isaac Herzog met with families of hostages in Hostage Square in Tel Aviv on Thursday.

Herzog and his wife joined the families to light candles on a Hanukkah menorah.

There are 114 hostages believed to be alive or unaccounted for in Gaza, according to the Israeli prime minister’s office. Twenty-one hostages were believed to have been killed in captivity and their bodies remain in Gaza, the government said.

Israeli leaflets allegedly offering bounties for information leading to the capture of Hamas leaders were reportedly dropped in Gaza on Thursday. Hamas leader Yahya Sinwar was on top of the list, with a reward of $400,000 offered next to his name.