Two people are in hospital after a crash involving two cars near Pwllheli.
The collision involving a Mini Cooper and an Audi A3 occurred on the A499 at Penrhos at just after 9am on Thursday morning (20th December).
A 17 year-old boy, who was driving the Mini Cooper, is in a serious condition at Ysbyty Gwynedd in Bangor – he was airlifted from the scene by the Welsh Air Ambulance.
A woman who was driving the Audi was taken by ambulance to Ysbyty Gwynedd, but her condition is unknown.
Police say the road is likely to remain closed for some time while recovery work takes place – drivers are being urged to avoid the area and diversions are in place.
Forensic officers are already carrying out inquiries at the scene of the crash as an investigation gets underway.
Sergeant Raymond Williams from the Roads Policing Unit in Llandygai said: ”Anybody who may have witnessed the Mini Cooper being driver along the A499 prior to the collision is asked to come forward. We are also appealing to anybody who may have dash cam footage to contact us.”
Anyone with information should contact the Western Roads Policing Unit on 101, quoting reference no. W180424.