British Transport Police are appealing for witnesses after a woman was verbally abused by a fellow passenger on her way to Accrington.
The incident happened at around 9.40pm on a train from Leeds to Accrington on Saturday, February 28.
Police said a man took picture of himself with the woman while she slept and then showed it to her before making a racist comment and showing it to two other men before leaving the train.
Investigating officer PC David Hewetson said: “The victim boarded the train at Leeds and fell asleep in her seat.
“She was woken by a man who took a photograph of himself with the victim. He then showed her the picture and made a racist comment.
“The man then got up and joined two other men who laughed as he showed the photograph to them. All three men left the train at Accrington.
“Nobody should have to put up with racist abuse, and we work hard to eradicate hate crime from the rail network.”
Anyone with information call British Transport Police on 0800 40 50 40, or text 61016, quoting reference PSUB/B15 of April 16.