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

I'm Nick Miles, and at 30 N Hours GMT on Tuesday,

the 28th of March, these are our main stories.

39 people have been killed in Northern Mexico

in a fire at a migrant centre near the US border.

Police in Nashville are investigating

why an attacker shot dead six people at a school,

including three children.

And there's a 10th day of strikes in France

in protests at plans to raise their retirement age.

Also in this podcast.

Twitter is burning itself down from the inside, I fear,

and it's going to rapidly become a ghost town.

We look at the latest changes to Twitter.

Many thousands of people use the Mexican city of Sudot Juarez

as a stopping off point in their attempt

to enter the United States.

Well, late yesterday evening, local time,

there was a fire at a centre being used

to hold some of the people detained by the authorities there.

As we record this podcast,

it's confirmed that at least 39 of them died.

...