It's more than 24 hours since the stabbing attack on a London-bound train on Saturday evening left several people injured, including one person who remains in a serious condition.

As forensic teams continue to comb for evidence, we now have a much clearer picture of what happened:

• Police have given us a timeline of events, and say one man is in custody on suspicion of attempted murder. They have since released a second man, who was also arrested last night, after they found he was not involved
• We still don't know the motive of the suspected attacker – a 32-year-old British man from Peterborough – though police have said there is nothing to suggest a terrorist incident
• Eleven people were hospitalised after the attack. One, a member of LNER staff who tried to stop the attack, remains in a life-threatening condition, while five others have since been discharged
• His actions were described by police as "nothing short of heroic" which "undoubtedly saved many people's lives"

• A lightning-fast response allowed armed officers to board the train and to arrest the suspected attacker eight minutes after being alerted, police said
• Several people who witnessed the attack described the desperation and fear they experienced as an assailant roamed the moving train while passengers huddled terrified in the buffet car
• While Huntingdon station itself remains closed, the rail line has reopened and trains are able to pass through on their way to London

We're now pausing our live coverage for the day, but you can stay across further updates in our main news story and get caught up on everything we know in our explainer.

Image source, Jo Black/BBC

Throughout the day, we've been hearing from eyewitnesses who have been helping piece together what happened on board the 18:25 service from Doncaster to London last night.

From the moment alarms began sounding, to when armed officers began boarding the train - here's what they've been telling us:

• Wren Chambers told us he first became aware that something was amiss when a man bolted down the carriage with a bloody arm, saying "they've got a knife, run"
• Olly Foster told the BBC he initially thought it might have been a night-after-Halloween prank, but he then saw an older man "block" an attacker from stabbing a younger girl, leaving him with a gash on his head and neck
• Inside the train, it felt like "you were in a box, and you couldn't get out of it", said one eyewitness who was travelling with his two children
• Some of the passengers, like Alistair Day, hid in the buffet car to escape the attacker. While inside, he helped a man who'd been stabbed - "I just want to know he's OK"
• When the train made the unscheduled stop in Huntingdon, some locals - like Cassie Marriot - came to assist frightened passengers. Marriot helped one young man who she said “looked shell shocked"
• After the train stopped, Amira Ostalski told us she saw what she believes was the suspected attacker get Tasered by police, providing her with a "moment of relief" after the "horrible" ordeal

Were you on the train? Do you know someone who was? If you'd like to, get in touch with us.

Image source, Andrew Johnson/Facebook

The quick-thinking actions of Andrew Johnson, the driver of the LNER service at the centre of the stabbing attack, are being applauded by fellow train drivers belonging to the union.

Nigel Roebuck, full-time organiser in the north-east of England for the train drivers' union Aslef and lead officer with LNER, says: "The driver did everything he was trained to do, at the right time and in the right way."

"He brought the train into a station where passengers could disembark safely and where police, fire and rescue, and ambulance crew could get on to the train and attend to the victims and, we believe, catch the culprit."

"He showed real courage, real dedication, and real determination in the most difficult of circumstances."

"Our thoughts tonight are with his colleague who is still in intensive care," Roebuck adds, in reference to the LNER worker who police say tried to stop the attack.

Kris Bramwell
BBC News

Earlier, we brought you the account of an eyewitness who hid inside the buffet car with other passengers during last night's attack.

We can now bring you another perspective from inside that car, this time from 35-year-old Matt Kingston, who was sitting in coach H when the attack began.

He ran from his seat and took refuge in the train's buffet car when he heard shouts of a stabbing.

Once inside, the door to the buffet car closed. Seconds later, he saw the attacker walk past on the other side, waving a knife.

“At that point, there was a young man in front of me who had said he was stabbed in the chest," Matt tells me. "So I helped with putting pressure on the wound.

“Once the train stopped and armed police arrived into the carriage, they safely got us out and I assisted the injured man and got him to the paramedics."

Image source, Getty Images

As we've been reporting, several Nottingham Forest fans were on last night's 18:25 service from Doncaster to London after watching their team play Manchester United at the City Ground.

We've now got a statement from the Reds expressing their "deepest concern and heartfelt sympathy" for all those involved - and paying tribute to the "extraordinary bravery" showcased by some of their fans.

"The Club is aware that many individuals demonstrated extraordinary bravery which undoubtedly helped prevent even greater harm.

"The entire Nottingham Forest family stands firmly behind them as they recover from the events of yesterday."

Owner Evangelos Marinakis also says the club will ensure fans caught up in the attack "receive[s] whatever financial support they require to enable them to access the best possible medical care as they recover".

Alison Earle
Reporting from Huntingdon station

I’ve just arrived at Huntingdon station and the first thing you notice is how quiet it is.

There are very few passers-by and many of the news crews that were reporting on last night’s incident have packed up for the day.

Every now and again that quiet is broken by a high-speed train going past. The east coast route is up and running again, although trains are not stopping here.

But at the station itself, forensics teams are still at work on the platform and inside the train where the stabbings took place, and in the station car park.

That evidence will no doubt form part of the investigation and help to build a picture of how this attack unfolded.

The Prince and Princess of Wales have expressed their "thoughts for the families and friends of all those impacted by the horrific events last night near Huntingdon" in a statement from Kensington Palace.

"He (Prince William) also wishes for me to express his thoughts are also with the first responders and train staff that acted so swiftly," it concludes.

Tom Joyner
Live reporter

We reported earlier how the fast actions of Andrew Johnson, the train driver of the LNER service that made the unscheduled stop in Huntingdon last night, potentially saved lives.

Responding to major incidents usually requires close co-ordination between train staff and emergency services. There are different ways the alarm can be raised, says a train driver we spoke to on condition of anonymity as they're not allowed to speak to the media.

One way is by a passenger pulling one of the bright red handles installed in carriages near the doors.

These trigger a loud, distinctive sound in the driver's cabin, giving them a few seconds to acknowledge it with the press of a button. If they don't press that button, it will trigger the emergency brakes.

At that point, the driver contacts the signaller – a rail official who co-ordinates the route from a nearby centre. In a major incident, drivers do this with the press of a red emergency button.

"You'd say it's an emergency, there's a stabbing going on, and I need to get to the nearest stopping point," the driver explains to us.

Their call to the signaller is then broadcast to all drivers in a several-kilometre radius to facilitate co-ordination between services operating in the same area.

The signaller will nominate somewhere to stop, which in last night's case was Huntingdon. They can also alert the British Transport Police (BTP), who may already be aware something is happening.

Once the train stops, the driver can make an announcement to the passengers and open the doors.

Marc Ashdown
BBC News

Image source, Andrew Johnson/Facebook

We can now name the driver of the LNER service at the centre of the knife attack as Andrew Johnson.

When the alarm was raised, he contacted the control room from his cab to get the train diverted from the fast track to the slow track, which has a platform at Huntingdon.

I reported earlier how his actions are believed to be why the emergency services could board so quickly to treat the seriously injured.

The train guard - who is still unnamed - and the person who was in contact with the attacker, remains in a life-threatening condition in hospital.

British Transport Police Detectives have just released an update into their investigation into the stabbings that took place on a train in Cambridgeshire last night.

Here's what you need to know:

• A 32-year-old British man from Peterborough is now being treated as the only suspect following an incident on board a London-bound train on Saturday
• The suspect boarded the train in Peterborough and a knife was recovered by officers at the scene, BTP said

• He and a 35-year-old were both arrested last night on suspicion of attempted murder - but the second man has since been released after police confirmed he was not involved

• An LNER rail staff member who tried to stop the attack remains in life-threatening condition, while five others have now been discharged from hospital
• The actions of that LNER employee "were nothing short of heroic and undoubtedly saved many people's lives", police say
• Specialist detectives are looking into the background of the suspect in custody and the events that led up to the attack

The BTP update also included remarks from LNER Managing Director David Horne, who says the company and staff are "deeply shocked and saddened" by yesterday's incident.

Horne thanks emergency services for their "quick and professional response" and pays tribute to the crew of the Doncaster to London King's Cross service for their actions.

"I would also like to recognise the driver, crew and our operational response colleagues for their bravery and quick actions."

Police say the suspect boarded the Doncaster to London King's Cross service at Peterborough.

They add a knife has been recovered at the scene.

Deputy Chief Constable Stuart Cundy said: "Our investigation is moving at pace and we are confident we are not looking for anyone else in connection to the incident.

"As would be expected, specialist detectives are looking into the background of the suspect we have in custody and the events that led up to the attack."

More now from the police update:

"Five casualties have now been discharged from hospital and one remains in a life-threatening condition.

"This casualty is a member of LNER rail staff who was on the train at the time and tried to stop the attacker.

"Detectives have reviewed the CCTV from the train and it is clear his actions were nothing short of heroic and undoubtedly saved many people's lives."

We've just received an update from British Transport Police.

They say a 32-year-old man arrested yesterday is now being treated "as the only suspect".

"A 35-year-old man from London who was also arrested at the scene has been released with no further action," the update reads.

"It was reported in good faith to officers responding to the incident that he was involved in the attack, and following enquiries we can confirm that he was not involved."

Rajini Vaidyanathan
Reporting from Huntingdon train station

It's dark now and the lights have been flipped on inside the train, which has been sitting here since it made an unscheduled stop at Huntingdon station on Saturday after multiple people were injured in a stabbing attack.

We are able to see through the windows, into the carriages, as forensics team move between each one.

As work continues into the evening here, we can see a number of police vans remain in the car park.

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Rajini Vaidyanathan
Reporting from Huntingdon train station

Image source, Jo Black/BBC

Warning: This post contains distressing details

Train passenger Amira Ostalski was with her friend when she saw a person get stabbed by someone who was carrying what appeared to be a large kitchen knife.

"It was like he had a mission to stab anyone he saw right in front of him," she told me.

"There was blood everywhere, people were screaming, 'he’s got a knife'".

"People were getting trampled on, it was a very busy train, so people were just trying to run away from the attacker, and people were falling, and people were standing on them. It was horrible."

She tells me she saw someone getting stabbed just "five or six rows" from where she was sitting. "I could have been next," she says.

She said the train was still on the move, with passengers trying to get the driver to stop, before it made the unscheduled stop at Huntingdon station.

There, she says, the conductor managed to open the door and people began fleeing.

After exiting the train, she says she then saw the suspected attacker jumping over a fence.

Amira and her friend then hid out in a taxi until police arrived.

"I saw how the man got Tasered and fell onto the ground next to the red bins," she says, describing it as a "moment of relief".

"I don’t think I’ll be able to sit on a train anymore," Amira says, adding: "I feel so vulnerable."

Tinshui Yeung
Live page editor

While many details remain unclear, we've been speaking to several eyewitnesses today - Steve, Alistair Day and Olly Foster - about how last night's attack on board the 18:25 train from Doncaster to London unfolded.

Here's what they've been telling us:

Coach J

• Police say they received the first distress calls at around 19:40 GMT
• Coach J - positioned near the front of the train - is where the incident began, one eyewitness who was sitting in Coach B told the BBC
• He said the attack then triggered an announcement across the train

Coach H

• Olly Foster, who was sitting in Coach H, one away from Coach J, said people began rushing here, shouting that a man was "stabbing everyone"
• He said an elderly man blocked the attacker from stabbing a younger girl, which left that man with a gash on his head and neck

• Alistair Day, who was also in this coach, moved with about 11 others to Coach G, where there is a café

Coach G

• After Day reached this coach, he saw a man at the window with a knife trying to get in, but passengers had locked the door
• A man who had been stabbed in the chest had also managed to get in to this coach, he said

Police said armed officers boarded the train and arrested two people within eight minutes of the 999 calls.

Mark Ashdown
Business correspondent

What we do know is that this train pulled out of the platform at Peterborough at 19:30 on time and then stopped at Huntingdon station - just 17 miles (27km) away.

These trains reach 120mph (193km/h), so we’re talking minutes between this incident starting and that train coming to a stop at Huntingdon.

For that to happen, there was a complicated process happening.

The driver, as soon as the alarm was raised, contacted the control centre and a decision was made to switch the train from the fast track, where it would have gone straight through Huntingdon, to the slower track so it could be stopped at that station.

That meant emergency services could react much quicker and many have been saying there’s no doubt that potentially could have saved lives.

This quick thinking likely prevented the train from stopping in the middle of nowhere or having to go to the next station – which would have taken 10-15 minutes.

Instead, it was able to be stopped at Huntingdon within minutes of distress calls being placed.

Crucially, too, there’s a police headquarters just a few seconds away from that station and the suspects were apprehended quickly.

We can now bring you an image that has been passed to the BBC by someone who witnessed last night's attack, and it appears to show one of the suspects being arrested by police.

• As a reminder, police say they arrested two men on suspicion of attempted murder following an incident on board a London-bound train on Saturday night.

Image source, Supplied