A teenage boy who died after being struck by a car has been named as Reece Meenan.
The 13-year-old, from the Coleraine area, died from injuries sustained when he was struck at Newbridge Road in the Co Londonderry town on Saturday.
The white car failed to stop at the scene but police traced it to Magherafelt several hours later and arrested a 23-year-old man.
The suspect has since been released on police bail pending further inquiries.
Meanwhile, the motorcyclist who was killed in a separate crash on Saturday was 28-year-old Barry Bell, from the Belvoir area of Belfast.
His motorbike was involved in a collision with a car on the Crossgar Road, Saintfield.
The man died in hospital from his injuries.
Police have appealed for any witnesses to both collisions to come forward.