British Transport Police have issued pictures of they believe could help their investigation into attacks on three passengers on a train heading to Bishopbriggs.
The incident happened on August 1 on the 10.48pm service from Glasgow Queen Street to Alloa, shortly after the train left Glasgow.
Officers are keen to speak to the persons shown in these images as they believe that they may be able to assist them with their enquiries.
The woman in the first image is dwhite, approximately 25-30 years old, with blonde hair, of thin build, and she spoke with an English accent. At the time of the incident, she was wearing a white top and black cardigan with black trousers.
The man in the second image is white, around 25 - 30 years old, with short hair and of slim build. At the time of the incident, he was wearing a white polo top, dark trousers, and navy blue shoes.
Police would also like to speak to the woman in the second image as they believe that she may have witnessed the incident.
She is white, aged 40 to 50, with blonde hair and of heavy build. At the time of the incident, she was wearing black clothing.
Constable Thomas Griffin, the BTP the officer in charge of the enquiry, said: “I am appealing to anyone who recognises the man and women shown in the photographs to contact me as a matter of urgency.”
Anyone with information should contact British Transport Police on 0800 40 50 40 or by texting 61016 - quoting reference B2 of 20 October 2015. Information can also be given anonymously to the independent charity Crimestoppers on 0800 555 111.