JOHN YANG: And tonight's other headlines, the South Korean government is expressing concern and regret over this week's immigration raid.

And at a Georgia Hyundai plant that swept up South Korean nationals.

Today, ICE released new video of the operation.

It shows agents descending on the site of an electric vehicle battery plant.

Nearly 500 workers were lined up, searched and detained, most of them South Koreans.

The lead agent for Homeland Security investigations in Georgia claims the detained workers either entered the country illegally, had expired visas or entered on visas that prohibited them from working.

The Israeli military is further expanding its operations in Gaza City, ordering area residents to move to humanitarian zones in the south.

The IDF made the announcement on social media and dropped leaflets over the flattened city.

As an incentive, the Israeli military said the humanitarian area would have field hospitals, clean water and food.

But aid groups are skeptical and have repeatedly warned that a large scale evacuation of Gaza City would worsen the dire humanitarian crisis.

In Ukraine.

President Volodymyr Zelenskyy is ruling out a trip to Moscow to negotiate with Russian leader Vladimir Putin.

He was responding to a suggestion Putin made on Friday.

In an interview with ABC News, Zelenskyy called the invitation a stalling tactic.

Not a step toward peace.

VOLODYMYR ZELENSKYY, UKRAINIAN PRESIDENT: I can't go to Moscow under when my country is under missiles under attacks each day.

I can't go to this capital of this terrorist.

I always said we can't trust Putin.

He play games and he's playing games with the United States, I think.

So it's to my mind.

JOHN YANG: Ukraine's foreign minister said at least seven countries have offered to host peace talks between Ukraine and Russia.

And in a galaxy not so far away, the legacy of Darth Vader lives on.

DARTH VADER: Your destiny lies with me.

Skywalker Obi Wan News to be true.

JOHN YANG: The prop lightsaber he wielded in that father son battle in the Empire Strikes Back has been sold at auction for $3.6 million.

That makes it the most expensive piece of Star Wars memorabilia to be auctioned off.

No word yet on the buyer who embraced this bit of the dark side.

Still to come on PBS News Weekend, why the Trump administration wants to shut down the only agency charged with investigating chemical disasters.

And we meet the Texas Trio at the forefront of a new movement in music.