The girl was taken to University Hospital Waterford, where she died from her injuries in the early hours of this morning.
An investigation is under way after a girl died following an assault at a residence in Co Wexford last night.
Gardaí and emergency services attended the scene in New Ross at approximately 11.45pm.
The girl was taken to University Hospital Waterford, where she died from her injuries in the early hours of this morning.
A woman and a man, both in their 30s, are being treated at University Hospital Wexford, for injuries that are not believed to be life-threatening.
The scene remains preserved for forensic examination.
The coroner has been notified and the Garda Technical Bureau and Office of the State Pathologist have been requested.
Gardaí are appealing to anyone who may have any information on this incident to contact New Ross Garda Station on 051 426 030, the Garda Confidential Line on 1800 666 111 or any Garda Station.