An 11-year-old boy who was hit by a car while riding his bike in Easington Lane, near Houghton, remains in hospital with potentially life-threatening injuries.
A 49-year-old man who was arrested in connection with the incident has been bailed pending further enquiries.
The incident happened on Monday August 6.
An 11-year-old boy was airlifted to hospital after colliding with a car while on a bike.
A doctor and a paramedic were flown to the scene where the boy was treated for serious head injuries.
He was airlifted to the Royal Victoria Infirmary in Newcastle, where his condition on arrival was critical.
A 49-year-old man has been arrested in connection with the incident.