On September 16, just before 11pm, a fight broke out between a group of people on platforms four and five at Norwood Junction station
The British Transport Police has released images of people who they believe may have information which could help the investigation.
A teenage boy, a man in his 50s from Lingfield, and a man in his 30s from Horsham have been arrested and bailed following the incident.
Anyone who recognises any of the people pictured or has any information should call the British Transport on 61016 or call 0800405040, quoting reference 2500112790.
Alternatively, you can call Crimestoppers anonymously on 0800 555 111.
