A holidaymaker had her suitcase containing all her holiday clothing and a camera stolen in Huddersfield on the way to Manchester Airport.
Now police have released an image of the man they want to speak to who left the train at Huddersfield with the case.
The theft took place on Wednesday, December, 2, on board the 2.52am service from York to Manchester Airport.
The victim left her case in the luggage storage racks in the vestibule area and went and sat further down the train. She realised it was missing when she got up to leave the train at Manchester.
A man was seen on CCTV acting suspiciously around the bag before taking it out of the rack and leaving the train at Huddersfield.
Officers believe the man in the images could have vital information about the incident.
Call 0800 40 50 40 or text 61016 quoting ref PSUB/B2 of 14/1/2016.
In unrelated investigations, police would like to speak to the people pictured in the image gallery below. The people pictured in the images may be witnesses as well as suspects. If you recognise anyone, contact police on 101 quoting the reference number on the image caption.
