Police have arrested a 24-year-old London man and recovered a vehicle from a London address following a hit and run in Hove.
The incident happened at the junction of Church Road and Sackville Road in Hove at 11.09pm on Christmas Day.
The man has been released on bail until February while enquiries continue.
The collision involved a blue Skoda Octavia taxi and a silver Vauxhall Insignia, which left the scene.
A teenage boy who was a passenger in the taxi suffered serious head injuries and has since undergone surgery in an effort to save the sight in his right eye.
The taxi driver sustained minor injuries.