Detectives from British Transport Police are appealing for witnesses after a fight broke out on board a train travelling from Leeds to Wakefield.
The brawl took place on board the 8.05pm Northern Rail Leeds to Knottingley service as it approached Woodlesford station on Saturday at around 8.20pm.
Detective Sergeant Matt Davies said: “We received a report from the trains conductor that a fight had broken out between approximately 15 to 20 people on the service.
“Five people - three men aged 24, 27 and 43, and two women, aged 20 and 43 - all from Castleford, have been arrested in connection with the incident which has left one man with a broken nose requiring hospital treatment and a number of others with cuts and bruises.
“We understand that a group of three men and three women boarded the service at Leeds. They then became involved in an altercation that resulted in serious disorder breaking out between two groups on the train
“We are keen to speak to anyone who may have been travelling on this service who may have any information that may help us with our inquiries.
“We believe the main group left the train at Castleford where officers attended but unfortunately no one came forward with any information at the time.”
An investigation has been launched and officers are currently speaking to rail staff on board the service and studying CCTV.
The arrested group have been released on police bail.
Detective Sergeant Davies added: “I would urge anyone who witnessed the incident on board this service to contact us straight away as you may have information which can assist the investigation.”
Anyone who has information which they believe can help police, is asked to contact British Transport Police on 0800 405040 or Crimestoppers on 0800 555111.