A man in his 40s has died in a two-car collision on the Clooney Road in Londonderry.
The incident happened at 00:50 BST on Sunday and involved a Ford Ka and a Peugeot 308.
A man and a woman in their 50s suffered non- life threatening injuries and the road remains closed.
On Saturday, a 79-year-old man died after an Audi A4 and a Ford Escort collided on the Cavan Road near Newtownbutler, County Fermanagh.
He has been named as Patrick James McGeough from the Monaghan area.
The accident happened at 14:25 BST and police have appealed for anyone with information to contact the non-emergency number of 101.