North Wales Police say they need helping tracing a teenage girl and boy who are missing from the Dolgellau area of Gwynedd.
Bianka Trevor, 16, and Sean Manning, 15, were last seen late on Tuesday evening walking from the village of Arthog towards Dolgellau.
Police say neither are familiar with the area, and both have links with north-west and southern England.
Anyone with information is asked to contact officers.
Bianka is described as approximately 5ft 6in (1.68m) tall with straight shoulder length black hair. She has a fair complexion and an English accent and when last seen she was wearing a two piece grey tracksuit.
Sean is described as about 5ft 6in (1.68m) tall with short brown hair and blue eyes. He also is described as having a fair complexion and was wearing a black jacket and black tracksuit bottoms.
The were last seen on the A493 road at about 23.30 GMT on Tuesday, 16 November.
Police are appealing to anyone who may have seen them on that night or since then to contact North Wales Police on 0844 601 1001/1002.