Two elderly people were killed in a road accident involving a car and a lorry in Derry yesterday morning, bringing the number of fatalities on Northern Ireland roads this year to 107.
Their deaths mark the end of a bank holiday weekend where five other people were killed in road accidents, four in the South and one in the North.
The Police Service of Northern Ireland (PSNI) is appealing for witnesses to the fatal crash in Derry.
It happened on the Damhead Road between Coleraine and Ballymena shortly before 9am.
Also in the North, a 19-year-old man was pronounced dead at the scene of a crash at the Ballynahinch Crossroads on the Cumber Road, near Hillsborough in Co Down, at 9pm on Saturday.
The four people who lost their lives in the South bring the number of fatalities on roads in the State to 324 this year, 15 more than in the same period last year.
Eleanor Ahern (25), Watergrass Hill, Cork, died when the car she was driving collided with a second car near Fermoy shortly before 6pm on Saturday.
Earlier on Saturday Francis Griffin (44), Ratoath Drive, Finglas, Dublin, died when the car he was driving was involved in a three-car collision on the N2 south of Ashbourne at 10.30am.
Also on Saturday Patrick McDonnell (18), Bangor Erris, Belmullet, was fatally injured when the car in which he was a passenger left the road at Kiltean, near Bangor Erris, at around 1am. In Co Cork, at 12.10am on Saturday, a Polish national, Przemyslaw Kiferling (27), was killed when the car he was travelling in appears to have gone out of control. It hit a ditch in Gurravesogue, Riverstick, near Kinsale.