British Transport Police (BTP) are searching for a woman who allegedly slapped a six-year-old boy on the face during a train journey to Edinburgh.
The assault happened while the child was travelling with a relative at around 3pm on Saturday, October 24. The service had come from Morpeth in Northumberland and was arriving at Waverley Station when the incident occurred.
It is understood the woman was not known to the youngster.
Witnesses urged to come forward
BTP said the incident was seen by several people, and anyone who witnessed what happened has been asked to contact the force. No arrests have been made at this time, and enquiries are ongoing.
A BTP spokesperson said: "Anyone with information is asked to contact BTP by texting 61016 or by calling 0800 40 50 40, quoting reference 481 of 24 October."
Appeal for information
Information can also be given anonymously to Crimestoppers on 0800 555 111.