Information is sought after a group of men acted in a rowdy manner and used racially offensive language towards another passenger on a train travelling between Edinburgh and Dundee on Saturday.
British Transport Police are urging people with information about the incident on the 10.08pm train to come forward.
The group of six men are reported to have been shouting, swearing and banging the tables on the Edinburgh to Dundee service and a woman who asked them to be quiet during the journey was racially abused.
The men alighted from the train when it arrived in Kirkcaldy.
One of the men is described as being about 6ft tall, medium build, aged in his late teens or 20s with short light brown hair.
He was wearing a white t-shirt, green trousers and white training shoes.
Another man is described as about 6ft tall, medium build, aged around 30.
He had dark, but balding hair and was wearing a shirt.
There is no descriptions of the other men available.
CCTV footage from the train and stations will be reviewed by police in an attempt to identify those responsible.
Constable Jan Langer is appealing for anyone who was on the train and has information which can assist enquiries to contact British Transport Police.
They can be contacted by calling 0800 40 50 40 or by texting 61016.
Alternatively contact Crimestoppers on 0800 555 111.