Two men died following an early morning road accident in Ballycastle, Co Antrim.
Johnny Black, 19, died and seven others were taken to hospital after a head on collision between two cars on the Cushendall Road near Ballycastle.
A 26-year-old man died in hospital as a result of his injuries on Monday.
Two women remain in a critical condition in the Royal Victoria Hospital, Belfast.
In west Belfast, a motorcyclist was killed in a road accident.
David Anderson, 42, from the Coleraine area, died after a collision on the Tornagrough Road in Hannahstown on Sunday afternoon.
An 11 year-old boy died over the weekend after he was seriously injured last Wednesday in Enniskillen