A man has been taken to hospital in a life-threatening condition after being stabbed on a moving train in London.
Two men were seen fighting while entering a train at Shortlands station, in south-east London, just before 16:00 GMT, British Transport Police said.
Footage on social media appears to show a man being attacked near the doors of a train carriage in front of horrified passengers. There have been no arrests.
Paramedics treated the injured man at Beckenham Junction Station.
Other passengers in the carriage can be heard gasping and shouting at the attacker to stop.
School lockdown
A local school, which is not being named by the BBC, said in an email to parents that it had initiated its “lockdown procedure”, bringing all children at its after-school club inside as a precaution.
“Parents collecting children from after-school club will be given the opportunity to make safe travel plans home and may remain on site until they have made these arrangements,” it said.
In a statement, British Transport Police (BTP) said: “A man sustained serious injures consistent with being stabbed.
“Officers attended, alongside colleagues from the Metropolitan Police Service and the London Ambulance Service, and the victim was taken to hospital with life-threatening injuries.”
London Ambulance Service added it had sent ambulance crews, an incident response officer and London’s Air Ambulance to the scene.
“We treated a man at the scene before taking him to a London major trauma centre,” a spokesperson continued.
BTP said its inquiries continued and detectives were appealing for witnesses to come forward.
It urged anyone with information on the incident to contact police or call Crimestoppers anonymously.
William Turner is a seasoned U.K. correspondent with a deep understanding of domestic affairs. With a passion for British politics and culture, he provides insightful analysis and comprehensive coverage of events within the United Kingdom.