Police are appealing for information to trace missing 17-year-old Erica Millerova.
Erica, who is Slovakian, was last seen by her family on Leeds Road in the Fagley area of Bradford around 7pm last Tuesday.
Despite a number of enquiries, police have been unable to trace Erica and are becoming increasingly concerned for her welfare.
Erica is not believed to have access to money or a phone and speaks very limited English.
She is described as white, 5ft 4in, slim build with long dark hair. She is thought to be wearing blue jeans and a black leather jacket.
Officers believe Erica may still be in the Bradford area following a sighting on Acton Street on Wednesday.
Anyone with information is asked to contact Airedale and North Bradford CID via: 101 or by calling Crimestoppers on: 0800 555 111