Six men are being sought after an attack at Preston Railway Station.
British Transport Police have released CCTV pictures.
Six men were reported to have attacked a man as he left a train at Platform 3 at the station.
The attack took place around 9.15pm on Saturday 26 January.
The attack spread across two platforms, which the victim punched to the floor on platform four and he continued to be attacked as he lay on the ground.
British Transport Police say six men then left the station via the subway and they believe those pictured may have information to help with the investigation.
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Below are the six men pictured in CCTV released by British Transport Police:
Anyone who recognises the men, or who has more information about the incident, is asked to contact BTP by texting 61016 or calling 0800405040, quoting reference number 590 of 26/01/19.