Witnesses say victims of a mass stabbing on board a train bound for London were forced to flee their alleged attacker through the carriages.

Nine people have been left with life-threatening injuries and a tenth sustained a non-life threatening wound after the stabbing on a train near Cambridge in the United Kingdom at 7.42pm (6.42am AEDT).

Two people have been arrested in connection with the incident, police said.

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A witness to the stabbing told the BBC he saw a man raise the alarm to fellow passengers as he bolted through the carriage with a bloodied arm.

The man recalled hearing him say "they've got a knife, run".

He also said another passenger was seen collapsed on the floor of the train.

Another witness, who was on the platform at Huntingdon when the train approached, said multiple people were bleeding as they disembarked the train.

London Underground worker Dean McFarlane told the BBC one victim was wearing a white shirt "completely covered in blood".

Passer-by Cassie saw police at the scene as the train arrived at Huntingdon station.

"We thought it was a train crash," she told Cambridgeshire Live.

"[There were] more emergency services than I have ever seen."

Some told Sky News of people trampling over each other, and some hiding in the toilets to escape.

Another saw one of the attackers being Tasered by police before being arrested.

Olly Foster told the BBC he heard people shouting "run, run, there's a guy literally stabbing everyone", but he believed it might have been a Halloween prank.

He then saw a man "covered in blood" and saw "blood all over the chair" he had leaned on.

A man "blocked" the attacker from stabbing a girl, leaving him hurt, he said.

It was the 6.25pm service travelling from Doncaster to London King's Cross, British Transport Police confirmed.

British Transport Chief Superintendent Chris Casey described the stabbing as "shocking" and said it would take some time before more information about the incident becomes clear.

"This is a shocking incident and first and foremost my thoughts are with those who have been injured this evening and their families," Casey said.

"We're conducting urgent enquiries to establish what has happened, and it could take some time before we are in a position to confirm anything further.

"At this early stage it would not be appropriate to speculate on the causes of the incident."

Two people were arrested at the station, which is around 120km north of London.

Huntington MP Ben Obese-Jecty told the BBC the attack happened after the train left Peterborough.

"Plato" was declared initially – the UK code word used by and emergency services when responding to a "marauding terror attack" – before it was later rescinded.

Counter-terrorism officers are assisting in the investigation however police have not yet established a motive.

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Three fire crews from Takapuna, Albany, and Greenhithe are at the scene.

The Paris prosecutor said two new suspects were handed preliminary charges for their alleged involvement in the crown jewels heist at the Louvre museum, three days after they were arrested by police as part of the sweeping investigation.

Prosecutor Laure Beccuau said a 37-year-old suspect was charged with theft by an organised gang and criminal conspiracy.

He was known to authorities for previous thefts, the statement said.

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The other suspect, a 38-year-old woman, was accused of being an accomplice.

They were both incarcerated.

They both denied involvement, the prosecutor said.

The lawyer for the woman, Adrien Sorrentino, told reporters his client is “devastated" because she disputes the accusations.

"She does not understand how she is implicated in any of the elements she is accused of," he said.

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Jewels have not been recovered

Officials said the jewels stolen in the October 19 heist have not been recovered – a trove valued around €88 million ($155 million), that includes a diamond-and-emerald necklace Napoleon gave to Empress Marie-Louise as a wedding gift, jewels tied to 19th-century Queens Marie-Amélie and Hortense, and Empress Eugénie’s pearl-and-diamond tiara.

Five people were arrested by police on Wednesday in connection with the case, including one tied to the heist by DNA.

That person is suspected of belonging to the team of four who used a freight lift truck to enter the Louvre. The prosecutor did not specify whether the person was among those charged on Saturday.

The three others have been released without charge, Beccuau said.

Two earlier suspects, men aged 34 and 39 from Aubervilliers, north of Paris, were charged this week with theft by an organised gang and criminal conspiracy.

Beccuau said both gave “minimalist” statements and “partially admitted” their involvement.

The two are believed to be the men who forced their way into the Apollo Gallery.

One was stopped at Charles-de-Gaulle Airport with a one-way ticket to Algeria; his DNA matched a scooter used in the getaway.

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About 100 investigators involved

Neither names nor extensive biographical details about the suspects have been made public.

Information about investigations is meant to be secret under French law, to avoid compromising police work and to ensure victims’ right to privacy, a policy known as “secret d’instruction.″

Only the prosecutor can speak publicly about developments, and violators can be prosecuted.

Earlier this week, Beccuau praised an “exceptional mobilisation” – about 100 investigators seven days a week, with roughly 150 forensic samples analysed and 189 items sealed as evidence.

It took robbers less than eight minutes to steal the jewels.

The team of four used a freight lift, allowing two of them to force a window and cut into two display cases with disc cutters, before the four fled on two scooters toward eastern Paris.

Only the “near-simultaneous” arrival of police and museum security stopped the thieves from torching the lift and destroying crucial evidence, the prosecutor said.

Investigators said there is no sign of insider help for now, though they are not ruling out a wider network beyond the four on camera.

In a separate case, Interior Minister Laurent Nuñez said six people were arrested on Thursday soon after a robbery at a gold refining laboratory in the city of Lyon during which thieves used explosives.

The loot, which was estimated to be worth 12 million euros ($21.2 million) has been recovered, Nuñez said on X.

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When Jonathan How's alarm sounds at the crack of dawn, he'll check the weather like most Australians before heading into work.

Unlike most workers though, the sky – rain, hail or shine – will dictate every move he makes in the office.

How is working his "dream" job as a Senior Meteorologist at the Bureau of Meteorology in Melbourne.

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For a decade, he has stood in front of TV cameras and relayed crucial information to Australians about weather events ranging from the 2019-20 Black Summer bushfires to deadly flash floods.

"I've wanted to be a meteorologist since I was in kindergarten, so it's something that I've always wanted to do," How told 9news.com.au.

"It was a lifelong dream of mine."

How begins his day at 6am and spends most of the morning doing TV interviews and talking to journalists about the day's weather.

Then he will work with his team of fellow weather experts to produce four daily forecasts for the states, cities and regions.

"The great thing about Australia is that there's always something going on in the weather, even when it's sunny," How said.

"Of course, when it is sunny, it does mean that things aren't quite as hectic. But sunny skies also can mean things like heatwaves or fire weather warnings."

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Australian weather is an extraordinary and untameable beast and it often even surprises the BoM.

A meteorologist's day can change very quickly and without warning.

For How, that's when his passion for weather is really ignited.

It was a busy week for How and his team after Melbourne recorded a rare tornado following severe thunderstorms across the city.

"Sometimes you get very little notice like what we had on Sunday in Melbourne," he said.

"The storm came through very quickly and we had to issue that warning pretty quick smart."

At times like this, How can't take his foot off the accelerator.

He and his team need to be "weather watching" every moment of the day.

"It's not set and forget. It's something that needs to be updated and continually monitored," he added.

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How recalls Cyclone Alfred being one of the busiest times of his career.

The tropical cyclone brought wild weather to south-east Queensland and northern NSW between February and March this year.

The bureau's job was to keep everyone informed, including the media and State Emergency Services (SES).

"We had a forecast which changed every hour," How said.

"So we needed to make sure that [updates] get out in time before the new one comes in.

"It can be a bit of a race against the clock."

Severe weather can be dangerous and it's important residents are aware of the latest warnings.

But How is careful not to cause unnecessary concern.

"We're not here to cause panic or create drama," he said.

"We just focus on what's coming up in the facts and make sure people have the information they need and make sure that they can make the right decisions."

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A teenager has died after an e-bike crash on the Gold Coast this morning.

The 15-year-old boy from Worongary was riding an electric dirt bike along a road in Broadbeach about 3am when he lost control and fell off, police said.

He died at the scene.

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Investigators are probing if he was going too fast.

Police are appealing for witnesses.

An eight year-old boy was killed in an e-bike crash earlier this week in the state.

There have been calls for a crackdown on e-bikes in the state.

Legal e-bikes can be ridden on paths unless otherwise signed, as long as riders obey bicycle rules such as wearing a helmet.

They must have a maximum continuous power output of 250 watts and be pedal-powered with motor assistance up to 25km/h.

There are no age limits for riding e-bikes in Queensland.

Bikes with motors over 250 watts are illegal, as are throttle-powered bikes without pedals, which are technically electric motorcycles and require registration, insurance and a licence and cannot be ridden on paths.

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Police say a child ran to ask for help after their mother was killed, as a potentially armed man remains on the run.

Officers say the child ran 400 metres to a neighbour after the alleged attack in the NSW Hunter Valley near Sydney last night.

Passers-by stopped and called police.

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The alleged attack happened in Kearsley, in Cessnock about 7.30pm yesterday.

"It was a traumatic incident as you can imagine, quite horrific for the family members all involved, her two adult children, one young child, so quite horrific," Superintendent Steve Laksa said.

Police say a gun was fired at the property.

They are searching for the woman's partner, Christopher James McLoughney, 37, who they say may have a gun.

McLoughney and the woman had been in a relationship since June this year, Laksa said.

Police believe he may in be in Cessnock, the Lower Hunter or Newcastle.

"Police believe this person may have crucial information in relation to the offence that was committed there last night," Laksa said.

"We just ask the community to provide any information they have in relation to him.

"I'm sure there would be someone out there who knows where he is, or may know where he is, we just call upon those people to give us call and provide their details or anonymously."

He is known to police and is white with short ginger hair, a thin build and is 175 -178cm tall.

The victim is the 58th woman alleged to have been killed in a domestic violence attack in Australia this year.

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Multiple people who had been allegedly plotting a violent attack over the Halloween weekend were arrested on Friday in Michigan, USA FBI Director Kash Patel said in a social media post.

The law enforcement effort was focused on suburban Detroit.

Patel said more information would be released later.

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Investigators believe the plot was inspired by Islamic State extremism and are investigating whether those in custody were potentially radicalised online, according to two people briefed on the investigation who could not publicly discuss details. They spoke to The Associated Press on condition of anonymity.

FBI and state police vehicles were in a neighborhood near Fordson High School in Dearborn.

People wearing shirts marked FBI walked in and out of a house, including one person who collected paper bags and other items from an evidence truck.

Police in Inkster, another suburb, said FBI personnel were at a storage facility there.

“There is no current threat to public safety,” said Jordan Hall, an FBI spokesperson in Detroit, who declined further comment.

The investigation involved discussion in an online chatroom involving at least some of the suspects who were taken into custody, people familiar with the investigation told AP.

The group had discussed carrying out an attack around Halloween, referring to “pumpkin day,” according to one of the people.

The other person briefed on the investigation confirmed that there had been a “pumpkin” reference.

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It wasn’t immediately clear if the group had the means to carry out an attack, but the reference to Halloween prompted the FBI to make arrests on Friday, one of the people said.

Michigan Gov. Gretchen Whitmer said on X that she was briefed by Patel.

She said she was grateful for “swift action” but offered no details.

Residents in the Dearborn neighbourhood watched as investigators worked at the house.

“It’s really scary because we have a lot of relatives around this neighborhood,” said Fatima Saleh, who was next door.

Separately, in May, the FBI said it arrested a man who had spent months planning an attack against a US Army site in suburban Detroit on behalf of the Islamic State group.

The man, Ammar Said, didn’t know that his supposed allies in the alleged plot were undercover FBI employees.

Said remains in custody, charged with attempting to provide support to a terrorist organisation.

The criminal complaint was replaced in September with a criminal “information” document, signaling that a plea agreement could be possible in the months ahead.

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A person was taken into custody as inquiries into the attack continue.