A passenger had a bag stolen from a train as it pulled up in Sheffield.
The bag was taken from the luggage area on a train travelling between London St Pancras and Sheffield.
Three youths were seen loitering at the back of the train and as it pulled up in the station one of them grabbed a bag which did not belong to him.
All three were around 17 or 18 years old, slim and around 5ft 7ins tall.
The first had ginger hair and a scar at the back of his head, the second had short, dark brown hair and was wearing a black jacket with an orange or beige diagonal stripe across the body and the third was wearing a dark baseball cap with a beige peak.
Anyone with information about the theft on Friday, December 2014 should call British Transport Police on 0800 40 50 40.