Police are appealing for witnesses following a collision involving an off-road motorcycle in Selkirk.
The incident happened around 8.30pm on Saturday in the Riverside Road area, close to Victoria Park and the leisure centre.
A 28-year-old man, believed to be a pillion passenger, suffered a serious head injury and is currently being treated within the Western General Hospital, Edinburgh. The rider left the scene.
Officers are now urging anyone with information that can assist them with their inquiries to get in touch.
Sergeant Vincent Fisher said; “This incident has left a young man with serious injuries and we are very keen to trace the rider of the motorcycle.
If you saw this incident, or the off-road motorcycle around the time of the crash, or have any information that can help us with our inquiries, please get in touch.”