Police are hunting a group of men who left a Good Samaritan with a broken nose after he stepped in to stop them harassing a woman on a train.
Detectives have released CCTV images of four men they still want to question in connection with the incident on a train from Liverpool Street.
One person has now been arrested, police said.
The 44-year-old victim, from Hornchurch, had boarded the train at Liverpool Street just after 12.30am on December 19 when he noticed the men harassing a woman.
Detective Constable Paul Attwell, who is investigating the attack on the man, said : “In order to stop the ordeal, the victim walked over and challenged the men’s behaviour, as the woman was alone at the time. As a result he was attacked by the group, who all left the train as it arrived into Seven Kings station.”
The victim stayed on the train and left at Romford where he reported the attack to police. He only discovered his nose was broken when he went to hospital.
DC Attwell said : “This was a nasty attack on a man returning from a Christmas evening out with friends, and who stepped in to stop a woman who was alone from being harassed.
“If you were on board the train and witnessed the attack, or have any further information, come forward and speak to police.”
Anyone with information can call British Transport Police on 0800 405040 or Crimestoppers.
