Derbyshire police are aiding South Yorkshire officers in trying to find a missing girl. Do you recognise her?
Natalie Pentland, who is 14, was last seen leaving her home address in the Brinsworth area of Rotherham at around 6pm on Tuesday 14 June.
Police are becoming increasingly worried as she has now been missing for four days.
Derbyshire Constabulary said: "She has not been seen or heard from since Tuesday.
"Officers, along with Natalie's family, are becoming increasingly concerned about her welfare.
"Natalie is described as white, around 5ft tall, of medium build with shoulder length blonde hair and blue eyes.
"She was last seen wearing an Army-style tracksuit, jumper and trousers."
Natalie has links to the Chesterfield and Skegness areas.
If you have seen Natalie or have any knowledge of where she might be please contact 101 quoting South Yorkshire Police incident 1206 of June 14 2016.