Gwent Police is appealing for information following a road traffic collision on Wednesday evening, November 25, at 10.05pm on Clytha Road near Abergavenny.
The collision involved a single vehicle, a black Citreon C2, and a 21-year-old male pedestrian.
The pedestrian was conveyed to Nevill Hall Hospital with serious injuries where he remains in a stable condition.
Gwent Police is appealing for information about the collision and anyone who may have witnessed it to contact 01633 838 111 or the Collision Investigation Unit on 01633 643 091.