Police are still investigating an assault that happened on board a train in Newcastle last year.
On the morning of Friday 25th of September, a 21-year old was punched in the head by another male passenger shortly after boarding the train at Metford Station.
Officers are now appealing for public assistance in the search for a man who may be able to help with their inquiries.
The man captured on CCTV is described as being of Aboriginal/Torres Strait Islander appearance, aged in his 20s, with dark curly hair and a beard.
He was wearing a red, white and black hooded jumper, green camouflage cargo pants and white sneakers.
Anyone with information is urged to contact Crime Stoppers.