One man is fighting for life and another seriously injured after a double stabbing at a Tube station in south London.
Officers were called to Elephant and Castle station just before 11.30pm on Sunday after two men were found in a nearby street.
They have both been admitted to hospital with stab wounds, with a 24-year-old man in a critical condition and a 25-year-old man in a serious condition, the British Transport Police said.
Two men have been arrested in relation to the incident.
Police are calling for any witnesses to come forward.
"This was a shocking act of violence and we are working hard to establish the full circumstances behind what happened," Detective Chief Inspector Sam Blackburn said.
"While the investigation is still at an early stage, at this time we believe there was an altercation between two groups of men inside the Underground station and it is here the victims sustained their injuries before making their way onto the street."
Elephant and Castle station is likely to be closed for a period during the early morning while forensic examinations take place, police said.
