Police searching for missing 13-year-old Erika Kacicova have released a new photo of her and revealed they have received a number of reported sightings.
The teenager has been missing from her home in Sheffield since 5 August. Around 50 officers are now taking part in the search for the girl, who is believed to be with people she knows.
The family of the missing girl have urged their daughter to return home and are said to be "distraught" at her disappearance.
South Yorkshire Police have been conducting house-to-house inquiries around the Sheffield area, and have expanded their search to Bradford.
A 22-year-old man from Bradford who was arrested on suspicion of child abduction has been released on bail.
Det insp Helen Tate said: "We have had various sightings of Erika today, but as of yet, none have been confirmed.
"It is out of character for Erika to be away from home for so long. We are getting increasingly concerned for her welfare as time goes on.
"Erika is only 13, she is young and a normal teenager, who listens to music and spends time with her family and friends. We want her to return safe and well.
"We have around 50 police officers and staff working hard day and night in a bid to find her.
"We've received dozens of calls from members of the public, some in West Yorkshire and some to us here in Sheffield. Please keep these calls coming in. We will look into any information you can give."
Tate concluded by pleading: "Erika, if you are reading this, please let us know you are okay. You're not in any trouble; we just need to know you are safe and well."
Erika is described as being around 4ft 11ins tall, Eastern European, of slim build, with long, dark-brown, straight hair and brown eyes. She was last seen wearing dark blue jeans and a denim short-sleeved top over a pink Adidas zip up hoodie.
The hoodie has yellow stripes down the arms and a white Adidas motif on the front . She was also wearing denim style ankle boots.
Erika speaks Slovakian and English, with an Eastern European accent.
Anyone with information regarding Erika's whereabouts should contact South Yorkshire Police on 101.