Four people have been killed and three more injured in road collisions in Northern Ireland since Friday.
Teenager David Heaslip (18) of Ballymiscaw Road, Holywood became the fourth fatality when he died of his injuries sustained in a crash in east Belfast on Friday.
Three young children remain critically ill in hospital after being involved in road accidents. They include a 10-year-old boy who was knocked down by two cars while walking in Lurgan.
Among the dead are Matthew Dagens (15) who died on Saturday after being struck by a car at Downpatrick on Friday.
James McGuigan (30) and his daughter, Lorna (8) died in a crash near Crumlin, also on Friday.
Mr McGuigan's two other daughters were critically injured in the same crash and remain in hospital. So far this year, 124 people have been killed on Northern Ireland's roads.