Police have launched an investigation after a man performed a solo sex act next to a woman on the Glasgow Subway.
The incident occurred on the 11.42am service between St Enoch and St George Cross stations on Thursday April 14.
The man, who is described as white and in his late 20s, stood next to the woman and exposed himself before performing the sex act.
He then alighted the train at St George’s Cross subway station.
The man was around 5ft 11, of a skinny build and had a blonde and ginger beard. He was wearing a khaki cardigan, beige trousers and a baseball cap at the time of the incident.
British Transport Police said the service was very busy at the time and officers wish to speak with anyone who may have witnessed the incident.
Anyone with information can contact BTP by texting 61016 or calling 0800 40 50 40 quoting reference 246 of April 14.
Alternatively, Crimestoppers can be contacted anonymously on 0800 555 111.