AMNA NAWAZ: Welcome to the "News Hour."

Tonight, there is war and violence from Gaza to the West Bank, after a terrorist attack killed six Israelis and wounded more than 20 at a bus stop in Jerusalem.

Israel has now raided the West Bank town where it says the gunmen came from.

GEOFF BENNETT: At the same time, Israel's military is assaulting Gaza City, destroying high-rise buildings, as the U.S. gives Hamas an ultimatum: Take a new cease-fire deal that's on the table or Israel will proceed with its plans to take over Gaza's largest city.

Nick Schifrin has our story.

NICK SCHIFRIN: Today, in the Holy City, terror.

During the morning rush hour at a busy bus stop, Jerusalem commuters ran from the sound of bullets.

Two gunmen that Israel identified as Palestinians from the West Bank shot into a busy bus after the driver refused to let them board.

OHEVYA SHARABI, Medic (through translator): We saw people lying on the ground, people bleeding, people in panic running in every direction.

It was a very, very difficult event.

NICK SCHIFRIN: Hamas prays the attack.

Israel says more than 20 were wounded, six killed, including a rabbi, laid to rest as loved ones mourned.

Israeli troops quickly shut down the West Bank area outside Jerusalem where it said the attackers lived and raided one of their homes.

Israeli Prime Minister Benjamin Netanyahu visited the attacked bus and vowed to pursue what he called West Bank terrorist nests and at the same time take over Gaza City.

BENJAMIN NETANYAHU, Israeli Prime Minister (through translator): I'm taking this opportunity to say to the residents of Gaza, listen to me carefully.

You have been warned.

Get out of there.

NICK SCHIFRIN: There's not much warning in Gaza these days, about nine seconds between an initial airstrike on a high-rise that Israel claims is being used by Hamas and a second airstrike designed to demolish.

Israel says it has now destroyed 50 high-rises, including two today.

The damage on the ground is devastating and widespread.

This is Gaza's largest city.

And among the ruins, there is shock.

This family had been sheltering in a tent next to the tower that is now rubble.

Ali Al-Qassas says he everyone else here had less than a 10-minute warning.

ALI AL-QASSAS, Displaced Gazan (through translator): Here are our women.

Look, where are they going to go?

Where will they go?

Here are their tents.

These children, what fault do they have in this?

NICK SCHIFRIN: It is a new phase in this war, destroying Gaza City's most visible buildings, terrifying even for a population for whom airstrikes have become all too common and deadly.

Health authorities say today's Israeli airstrikes killed more than 50 Palestinians, the youngest only 2 years old.

And Israel's threats to take over Gaza City have sparked a daily dilemma for everyone sheltering here: Do we stay or do we go again?

Some refuse, despite the Israeli leaflets that look like birds, but carry ominous warnings, which neighborhood to evacuate.

Others feel there is no choice, even if they're at a loss for where to go.

SHIREEN AL-LADA, Displaced Gazan (through translator): Every time we move to a place, we get displaced.

Every time we go to an area, they attack.

Every time we go somewhere, they ask us to leave.

There's no safe place in Gaza.

I am compelled to repeat this experience.

NICK SCHIFRIN: Israel and the U.S. say this moment is not a repeat, but what President Trump called this weekend a last warning, a new cease-fire offer for Hamas to release all Israeli hostages, including living and dead, and then negotiate an end of the war during a 60-day cease-fire.

Israel's in support.

The Hamas official tonight called it a -- quote -- "shameful surrender," suggesting the war will go on and Israel will proceed with its threat to take over Gaza City.

For the "PBS News Hour," I'm Nick Schifrin.