The woman who died following a road crash in Co Tyrone last night has been named as 19-year-old Janine Black from Aughafad Road, Pomeroy.
Ms Black was in a two-car collision on the A5 Ballygawley to Aughnacloy Road last night.
She was taken to hospital with head injuries after the accident, but died later.
A man who was travelling in a Volkswagen Golf with her was also treated, but his injuries are not thought to be life threatening. The driver of the second car, a Fiat Stilo, did not receive hospital treatment.
The crash came less than 24 hours after three teenagers were killed in Castlereagh, on the outskirts of east Belfast.
Nineteen-year-old twin brothers and their friend, aged 18, all died in the single vehicle accident on the Ballygowan Road early on Saturday morning. All three victims are believed to be from the east Belfast area.
The four weekend deaths mean 39 people have been killed on Northern Ireland's roads this year — up from 34 for the same period 12 months ago.