On December 17, officers responded to a call at Pimlico Underground Station at 8.30am where the victim was found with stab wounds to the neck.
The man, who had been previously shopping with a friend at Sainsbury’s in Vauxhall Underground Station, had taken the northbound Victoria Line Train with his friend.
They were then confronted by two men seen earlier at the station.
The victim is currently in hospital being treated for non-life-threatening injuries.
Detectives are asking the public to assist in identifying individuals from released photos as they may be valuable to their investigation.
Information can be sent to BTP by texting 61016 or calling 0800 40 50 40, quoting reference 151-171223.
Alternatively, Crimestoppers can be contacted anonymously on 0800 555 111.
A spokesperson for British Transport Police said: “Detectives are appealing for witnesses after a man was believed to be stabbed on an Underground train between Vauxhall and Pimlico.
“Today (Sunday 17 December 2023), at around 8.30am, officers were called to Pimlico Underground station to a man who had received a stab wound to the neck.
“The man was taken by ambulance to hospital where he is being treated for what is believed to be a non-life-threatening injury.
“Earlier this morning the man had been shopping with a friend at Sainsbury’s at Vauxhall Underground station.
“The friends then boarded a northbound Victoria Line train to Pimlico when they were confronted by two men they’d seen earlier in the station.
“Detectives are appealing for the public’s help in identifying the individuals in the photos as they believe they may be able to help with their investigation.
“Were you in or near Sainsbury’s Vauxhall Underground station at around 8am this morning? Did you witness the incident between four men on the train between Vauxhall and Pimlico?
“Anyone with information is asked to contact BTP by texting 61016, or by calling 0800 40 50 40, quoting reference 151-171223.
“Alternatively, you can contact Crimestoppers anonymously on 0800 555 111.”