Police at Strand Road are appealing for information about a traffic collision in which a motorcyclist was very seriously injured.
The incident involved a motorcycle and a car and occurred at the Newlyn Terrace/Chapel Road junction in the Waterside at about 5pm on Thursday, 19th.
The 17-year-old motorcyclist was taken to Altnagelvin Hospital where he is being treated for head injuries.
Inspector Sam Shearer, the senior investigating officer, said police wanted to hear from anyone who witnessed the collision or saw the two vehicles beforehand.
Witnesses can contact Strand Road police station on the 101 non-emergency number.