Five people, including a child, were killed in two separate road accidents this morning.
Four people died in a multi-vehicle collision a few miles from Cahir in Co Tipperary.
Those who died have been named. They were 71-year-old Mary Dalton, from Glockamara in North Cork and two of her daughters, Kathleen Quish, 47 and Mary Downes, 31. One of Mary Downes' sons, Robert, aged four, was also killed.
Another grandchild, aged six, has been taken to Cork University Hospital where his condition has been described as critical.
Four trucks and a car were involved in the accident which happened just before 8am near Kilcoran Lodge on the main Cork-Dublin road. Two of the truck drivers have been taken to hospital, one with serious injuries.
Gardaí are investigating the collision.
Man killed in Co Sligo crash
A man was also killed in a head-on collision near Tubbercurry in Co Sligo. He was aged 30 and a resident of Sligo Town, but believed to be originally from the UK.
A woman was injured in the two-car accident and was taken to Sligo General Hospital where her condition is described as stable.
The accident happened in foggy conditions shortly before 7.30am on the Sligo side of the town.