Two separate weekend car crashes have left one woman fighting for her life in hospital and an 18-year-old woman dead.
The carnage comes after three young people died in a horrific two-car smash near Comber last Thursday.
Police are appealing for witnesses after a 47-year-old woman was hit by a scooter on the Crumlin Road in north Belfast at around 4.30pm on Saturday.
The 20-year-old scooter rider was also taken to hospital with back and neck injuries, although they are not believed to be life threatening.
Also on Saturday, the Co Down village of Killyleagh woke up to discover a fourth young person from the area had been killed on the roads within 24 hours.
Student Megan Nash from Killyleagh died on Friday night, less than 10 miles from where her friend John Pirie (31), also from Killyleagh, had died earlier that morning.
His partner Pauline McCaul (32) from Downpatrick and Rab Newell (43), from Ballygowan, were also killed in the crash.
Megan was a backseat passenger in a Ford Ka which collided with a Renault Clio on the Ballytrim Road between Crossgar and Killyleagh.
The other two young people in the Ford and the driver of the Renault were taken to hospital with non-serious injuries.
DUP councillor Billy Walker, Megan’s second cousin, said the death will “haunt the family forever”.”She was such a beautiful, happy wee girl,” he said.
“She was the youngest in the family and they just doted on her.
“Words cannot even explain the pain they are feeling, particularly coming so close to Christmas. From now on, every Christmas will remind them of this awful time.\[Brian Lovett\]”I was up at the house hours after the crash and I don’t think they even knew I was there.
“They were just sitting there in complete silence.
“I’d say we’ll never want to celebrate Christmas again.”
The funerals of John Pirie at Killyleagh First Presbyterian Church and Pauline McCaul in Downpatrick took place yesterday.
On Tuesday, a service for Rab Newell will take place in Newtownards before cremation at Roselawn in Belfast. The funeral of Megan Nash is expected to take place at Killyleagh Church of Ireland.