In a harrowing incident near Cambridge, UK, nine individuals have sustained life-threatening injuries following a stabbing on a train. A tenth person suffered a less severe wound. The attack occurred at 7:42 p.m. local time (6:42 a.m. AEDT).

Authorities have apprehended two suspects in connection with the violent episode, according to police reports.

One witness recounted the chaos, recalling a passenger shouting, “They’ve got a knife, run,” as the situation unfolded.

Another witness described the distressing scene, noting that a passenger had collapsed on the train floor amidst the turmoil.

A separate observer on the platform at Huntingdon station reported seeing several wounded individuals, visibly bleeding, as they exited 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.”

The train made an unscheduled stop at Huntingdon due to the incident.

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.

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