This is The Guardian.

This afternoon, a horrifying mass stabbing on a London-bound train.

The train from Doncaster was packed with people heading out on a Saturday night, the day after Halloween.

About an hour from London, it was suddenly clear that something terrible was unfolding.

A guy suddenly run past going, run, run, there's a guy stabbing literally everyone at everything. At first, there was a few of us kind of looking at each other, like thinking, was it a joke, like it's Halloween, I'd be pranking. And then I look at my hand and there's covered in blood, and then I look at the chair and there's blood all over the chairs. And I'm thinking, okay, this is pretty serious. The train made an emergency stop at Huntingdon Station in Cambridgeshire,

where emergency services were able to board,

and the grim reality of a mass stabbing became clear.

Ten people are in hospital, nine with life-threatening injuries,

after a mass stabbing on a train in

Cambridgeshire on Saturday evening.

A 32-year-old man has been charged with 10 counts of attempted murder, and police are

investigating if he could be linked to three other knife attacks on the same weekend.

From The Guardian, I'm Lucy Hoff.

Today in Focus Extra, what we know about the shocking knife attack on a Cambridgeshire train. Ben Quinn, you're a Guardian senior reporter,

and you've been in Huntington reporting from the scene of this terrible attack.

First of all, walk me through what we know about what happened on Saturday night.

Well, on Saturday night, I think many people would have learned about it via a news flash on their phones.

And this was a train which left Doncaster at around about 6.25 p.m.

It should have arrived in Kings Cross two hours later.

But made a way through the journey, something awful happened.

And what we now know is that a man with a knife began stabbing people on this train.

And around 10 people have been hospitalized, many of them

...