Police investigating an alleged assault at St Pancras station in London are looking to bring a 42-year-old man into custody.
British Transport Police said the suspect, from Bedfordshire, boarded a flight out of the country in the early hours of Tuesday morning.
Officers were called to the scene just after 8.40pm on Monday following reports of an assault.
A man was taken to hospital with serious injuries which are not thought to be life-threatening.
“Detectives are continuing to work closely to progress the investigation and bring the man into custody for questioning,” a statement reads.
It comes after footage emerged purporting to show right-wing activist Tommy Robinson walking back and forth next to a man lying motionless at St Pancras.
A concerned onlooker calls for help before Robinson shouts: “You saw him. He came at me bruv, you saw that, he came at me”.
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The video does not show the moment the man was allegedly attacked.
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Robinson, whose real name is Stephen Yaxley-Lennon, has since reposted a tweet which claimed he acted in self-defence.
A London Ambulance Service spokesperson said: “We were called at 8.40pm on Monday July 28 to reports of an assault at St Pancras International Rail Station, NW1.
“We sent an ambulance crew to the scene and treated a man before taking him to a major trauma centre.”
Sky News has approached Robinson for comment.
