Detectives are searching for a man after a fight broke out on an Eastbourne-bound train and a member of staff nearly fell onto the track.
British Transport Police (BTP) are appealing for witnesses to the incident, which was sparked when an altercation broke out between two groups.
Investigators have released an image of a man (pictured) they wish to speak to in connection with the incident, which took place on Saturday, August 31 on a Brighton to Ashford train while it stopped at Lewes.
Detective Constable Nigel Craig said, “After the service had pulled into Lewes station, a group of men and women on the train became involved in an altercation between another group of people who were waiting to board.
“One of the women, who was part of the group, began banging on the window close to the gap between the train and the platform.
“As a concerned member of rail staff intervened, one of the men in the group rugby-tackled him to the floor, causing him to fall – with the woman – close to the platform edge.
“The member of rail staff was left with a graze to his knee and hand.”
Officers have been following several lines of enquiry into the incident and have obtained images of a man they believe has key information.
The image has been circulated on police intelligence systems, but to no avail, and police are now calling on the public to help identify him.
DC Craig added, “This was an unprovoked assault on a member of staff who was simply doing his job.
“The image we have is very clear and we are still working to establish the man’s identity.
“If you recognise the man pictured, or have any information that could help our investigation, please get in touch.”
Anyone with information should contact British Transport Police on Freefone 0800 40 50 40 or text 61016 quoting LSA/B3 of 26/11/2013. Alternatively, contact the independent charity, Crimestoppers, anonymously on 0800 555 111.