Police are searching for a man after a 14-year-old girl was allegedly sexually assaulted at a station while boarding a train.
British Transport Police (BTP) said the girl was boarding a train at Sheffield Train Station at 6.30pm on October 12 when a man "touched her inappropriately."
The force has now released pictures of a man that officers want to speak to about the assault.
The full statement from the force read: "Do you recognise this man?
"Officers investigating a sexual assault at Sheffield railway station are releasing CCTV images in connection.
"At around 6.30pm on 12 October, a 14-year-old girl was boarding a train at the station when a man touched her inappropriately.
"Officers believe the man in the CCTV images may have information which could help their investigation.
"If you recognise him, or have any information, please contact BTP by texting 61016 or calling 0800 40 50 40 quoting reference 514 of 12 October."
Information could also be given anonymously to Crimestoppers on 0800 555 111.