Middle East live updates: Hostage's body recovered from tunnel in Gaza

President-elect Donald Trump's incoming Middle East envoy, Steve Witkoff, told reporters that President Joe Biden's team has been "very collaborative" on working towards a Gaza hostage release deal, with renewed talks ongoing in Qatar.

"We're just very collaborative together," Witkoff said following Trump's Tuesday Mar-a-Lago press conference. "I mean, this is a tense negotiation, so no one has pride of authorship. We are totally outcome oriented. Let's get them home."

Witkoff said he speaks every day with Brett McGurk, the top Biden White House official on Middle East policy.

During the press conference, Trump said "all hell will break loose" if the remaining hostages aren't released before Inauguration Day on Jan. 20.

Witkoff said "there was no exaggeration or embellishment with what the president said."

"If you get on the phone with the hostage families, it's harrowing to listen to them," Witkoff said. "There are people who just want the remains of their children back…it is withering to listen to this, and he [Trump] listens to them all."

Witkoff said the incoming administration "aspirationally" hopes for a 42-day ceasefire to be enacted before the inauguration.

"President Trump's persona is such that he's driving the narrative on these negotiations," Witkoff added. "He will be in office when that 42-day ceasefire is over. That's what Hamas cares about -- how we move to phase two. That's what the Israelis care about, how President Trump will be at the end of that ceasefire."

Witkoff said he's seen intelligence reports about how many hostages remain alive, and said it's "not a small amount."

-ABC News' Selina Wang

There were multiple overnight attacks by Israeli settlers against Palestinians in parts of the West Bank, following a shooting attack that killed three Israelis and injured eight others earlier on Monday.

The Palestinian Authority-run WAFA news agency reported at least two attacks by settlers on Palestinian communities in Bethlehem and Ramallah.

The Yesh Din human rights group reported as many as 100 settlers attacking Palestinian villages, some in the al-Funduq area where Monday's attack occurred.

Israeli security forces are still searching for the suspected perpetrators of Monday's shooting attack, which Israeli Defense Minister Israel Katz described as "an act of war."

-ABC News' Joe Simonetti

Three Israelis were killed in a shooting that targeted a bus and a vehicle in the occupied West Bank on Monday morning, security and emergency officials said.

An Israeli police officer and two women in their 60s were killed, Israeli emergency services said.

The attack occurred in the village of Al-Funduq, on one of the main east-west roads crossing the Palestinian territory, much of which is under Israeli security control.

Israel's Magen David Adom rescue service said it provided medical treatment to seven injured people, including the bus driver who was in serious condition.

The Israel Defense Forces said it launched a manhunt for the suspected Palestinian shooters.

"Anyone who follows the path of Hamas in Gaza and sponsors the murder and harm of Jews will pay heavy prices, " Israeli Defence Minister Israel Katz said in a post on his X account, reacting to the attack.

Sending his condolences to the families of the victims, the Israeli Prime Minister Benjamin Netanyahu said the attackers "will not get away."

"We will find the abhorrent murderers and settle accounts with them and with all those who aided them," his statement said.

The Palestinian Health Ministry in Ramallah said in an extensive report Sunday that at least 838 Palestinians -- including 173 children -- have been killed by Israeli fire and over 6,700 have been injured in the West Bank since the start of the war in Gaza in October 2023.

-ABC News' Jordana Miller, Diaa Ostaz and Somayeh Malekian

Secretary of State Antony Blinken told reporters Monday that the U.S. wants a ceasefire deal in Gaza and all remaining captives released within the next two weeks, before President-elect Donald Trump takes office on Jan. 20.

"We very much want to bring this over the finish line in the next two weeks," Blinken told reporters while in Seoul, South Korea.

Blinken reported "intensified engagement," including by Hamas, on reaching a deal, though added "we are yet to see agreement on final points."

"We need Hamas to make the final necessary decisions to complete the agreement and to fundamentally change the circumstance for the hostages, getting them out, for people in Gaza, bringing them relief, and for the region as a whole, creating an opportunity to actually move forward to something better, more secure for everyone involved," Blinken said.

"If we don't get it across the finish line in the next two weeks, I'm confident that it will get its completion at some point, hopefully sooner rather than later," Blinken added.

-ABC News' Joe Simonetti