Gardaí are appealing for information following a fatal collision near Pallasgreen yesterday.
The incident which involved a car, occurred at approximately 3.30am in Kilduff.
The driver of the vehicle, a woman aged in her 20s, received fatal injuries following the collision.
A male passenger (30s), is currently receiving treatment for serious injuries at University Hospital Limerick.
While female child and a male toddler are also receiving medical treatment but their injuries are not life-threatening.
Anyone who has information, who may have witnessed the incident or who may have video footage (including dash-cam), are asked to contact Henry Street Garda Station 061 212 400 the Garda Confidential Line on 1800 666 111, or any Garda Station.