This is the Global News Podcast from the BBC World Service.

I'm Jackie Leonard, and in the early hours of Wednesday the 26th of March, these are our main stories.

Donald Trump says there'll be an investigation into how a journalist was invited onto a messaging group

where he saw plans for US airstrikes in Yemen, but the president has defended his team.

Hundreds of people in northern Gaza have staged a protest against Hamas, the biggest since the war there began.

And the White House says Russia and Ukraine have agreed to stop targeting shipping in the Black Sea,

but Moscow has insisted on further conditions before it implements any deal.

Also in this podcast, and I may have asked this question before, is there life on Mars?

The rover found there were some compounds in this particular rock.

And this is really exciting because these compounds haven't been found on Mars before.

President Trump says there'll be an investigation into how a journalist came to be invited onto a messaging group

where top officials were discussing a US military attack on Houthis in Yemen.

He also said his administration would be taking a look at the messaging system signal itself.

But Mr. Trump defended the officials involved, including the National Security Advisor Mike Walt,

who seems to have invited the journalist Jeffrey Goldberg from the Atlantic magazine into the group conversation.

We have an amazing group. Our national security now is stronger than it's ever been.

There was no classified information, as I understand it. They used a app, if you want to call it an app,

that a lot of people use, a lot of people in government use,

a lot of people in the media used.

Earlier, the CIA director and the head of US National Intelligence told a Senate

committee that no war details or identities of undercover officers, word is closed.

At times, the exchanges in the committee hearing were very heated. This is the Democrat

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