The 18-year-old was found lying on the path of John Street
A teenager has undergone surgery after a serious assault in Waterford.
The 18-year-old boy was found by gardaí on John Street in the city last night at 11.30pm.
Gardaí say they are treating the incident as a serious assault.
The teenager remains in University Hospital Waterford this morning.
Gardaí are appealing for witnesses, in particular anyone who may have been in John Street/John Bridge area of Waterford last night between 11.00pm and midnight, to get in touch.
They can contact the Garda Confidential Line on 1-800-666-111 or any garda station.