Thames Valley Police have issued a public appeal after a 19-year-old woman disappeared from Kidlington.
The individual, identified only as Bibi, was reported missing on Thursday 17 September.
Officers believe she may have travelled to Oxford or Birmingham.
A photograph and full description have been circulated by the force to assist the public in identifying her.
She is described as approximately 5ft 3ins in height, of slim build, with long black hair and brown eyes.
At the time of her disappearance, she was wearing a burgundy-coloured top, black trousers and a black hijab.
Investigating officers have expressed concern for her wellbeing.
Anyone with information regarding her whereabouts or anyone who believes they may have seen her is urged to contact Thames Valley Police immediately by dialling 999.
The investigation reference number has been provided as 43260486157.