Police looking for a teenage mother who has been missing from her home in Rotherham for three days have brought in divers to search a canal.
Laura Wilson, 17, was last seen by friends on Saturday night close to her home in the Holmes area of the town.
Police have found items thought to be Miss Wilson's and the towpath of the Sheffield and South Yorkshire Navigation Canal has been sealed off.
A 17-year-old local youth has been arrested on suspicion of assault.
Miss Wilson's four-month-old daughter is being cared for by relatives, South Yorkshire Police said.
A force spokesman said: "At this stage, officers are still treating this as a missing person investigation and are continuing to make inquiries to locate Laura.
"Forensic tests are being carried out and police divers will be on site to search the canal."
The towpath was being treated as "a potential crime scene", the spokesman added.
He said: "The family have not heard from Laura since Saturday evening and are understandably distraught and plead with the public to help them trace their loved one."
Laura is described as white, 5ft 7in tall and of medium build. She has dark collar-length hair.
She was last seen wearing a red and white horizontal striped top, dark blue skinny jeans, Adidas plimsolls and a dark-coloured parka-type coat with fur around the hood.
The parka has the brand name "Helly Hansen" in pink lettering.