yesterday fighting in Gaza, the deadliest day for# Israel since Hamas' October 7 terrorist attacks.

Israel's government vowed to continue the# war amid fierce fighting.

Caught in between,## tens of thousands of Palestinian civilians.

In a moment, Nick Schifrin speaks with the U.N.'s# humanitarian but first his report on this deadly# day for Israel's defense forces.

NICK SCHIFRIN: A prayer for the# dead, a family grappling with grief.

Sergeant 1st Class Hadar Kapeluk was# a 23-year-old reservist killed in## Gaza yesterday.

Sergeant Major Ilay# Levy was from the same unit.

Today,## his mother said a final goodbye, and his# father delivered a message of determination.

MAN (through translator): Let's show our enemies# that we are strong and even in such a difficult## situation we do not break.

Please say with# me three times, the people of Israel l NICK SCHIFRIN: An Israeli officer described how# 21 reservists died in the destroyed building## behind him.

The 261st Brigade was preparing to# demolish the building with their own explosives,## when a Palestinian militant opened fire, said# Israeli army spokesman Rear Admiral Daniel Hagari.

REAR ADM. DANIEL HAGARI, Spokesperson, Israeli# Defense Forces (through translator): The first## out.

The hit apparently led# to the explosion that caused## the collapse of the building and the# collapse of the building next NI CK SCHIFRIN: The fighting is most intense# in Southern Gaza on Hamas' home turf,## literally.

Hamas' video shows a fighter firing# from a bedroom window and Hamas fighters shooting## from inside blown-out buildings, aiming at# Israeli soldiers in buildings across the way.

Israeli military video shows soldiers in close# combat and exposing what Israel says is a Hamas## tunnel next to Khan Yunis schools.

Today Israeli# Prime Minister Benjamin Netanyahu vowed victory.

BENJAMIN NETANYAHU, Israeli Prime Minister# (through translator): Together, we will## fight an NICK SCHIFRIN: In Southern Gaza, victims# of the war arrived by donkey cart.

Ahmed Masmah in green bears no relation to the# victims.

He was, instead, the bearer of bodies## he found near his home.

He brought them# here to try and give dignity to the dead.

AHMED MASMAH, Displaced Palestinian# (through translator): Seeing them## gives even if there was an aircraft# above us wanting to target us.

NICK SCHIFRIN: Others are caught in# an endless cycle of displacement,## fleeing farther and farther# south into less and less land.

AHMAD SHURRAB, Displaced Palestinian# (through translator): Where do we go?## This is the 17th tim