A RAIL staff member was left with a cut lip after he was assaulted on board a train.
On Tuesday February 19 at 7.15am as the train pulled into Darton railway station, the victim asked two men to leave the train after they refused to show a valid ticket.
One of the men then threatened the staff member before punching him in the mouth and he suffered a cut lip. Both suspects left the service at Darton station.
The British Transport Police (BTP) have released CCTV images in a bid to try and identify the persons who may hold information that could help with enquiries.
A spokesman from BTP said: "It is believed they had intended to travel to Chapeltown station. Officers believe the men in the images may have information that could help their ongoing investigation.
"Anyone who recognises the men, or who has more information about the incident, is asked to contact BTP by texting 61016 or calling 0800 40 50 40, quoting reference number 79-190219."