A manhunt has been launched after a young girl was sexually harassed at Swinton rail station.
British Transport Police is appealing for help after the incident at around 6am on Saturday.
Investigating officer PC Richard Ward said the incident had left the teen extremely distressed.
He added: “The young girl was waiting for a train, when a man tried to engage her in conversation, before asking inappropriate questions. He then began touching himself inappropriately over his clothing.
“Both the victim and the man boarded a train at Swinton, with the victim sitting away from the man, who left the train at Rotherham.”
The man police would like to speak to about the incident is described as Asian, aged in his 30s, around 5 ft 8 ins, of slim build, with several metal, possibly gold teeth. He was wearing a black coat, black trousers and a black beanie hat and was carrying a black rucksack.
PC Ward added: “The actions of the man at Swinton station left the young girl feeling extremely uncomfortable and distressed. She feared for her safety. It is vital we find the man responsible.”
Anyone with information about the incident is asked to contact British Transport Police on 0800 40 50 40, or text 61016, quoting reference PSUB/B14 of 20/01/15.
Information can also be passed anonymously to Crimestoppers on 0800 555 111.