Bus and taxi companies are being spoken to in the hunt to find a missing teenager.

Sophie Naylor was last seen on the A82 near Milton Brae, Dumbarton, at 3pm on Saturday.

The 16-year-old, who was upset when she went missing, is 5ft 4in, slim and has blue eyes and brown hair.

She was wearing a dark blue jacket with a hood, washed out jeans and white shoes.

Police are speaking to bus and taxi companies in a bid to find her.

Chief inspector Scott Carlin said: "We do not believe that Sophie has any money or a mobile phone with her and know that she was very upset on Saturday when she was last seen and didn't say where she was going.

"Police as well as her family and friends just want to know that she is safe and well and urge anyone who has seen her or anyone who knows of her present whereabouts to contact us immediately.

"Sophie is originally from the Bo'ness area and we have been liaising with British Transport Police, bus companies and taxi companies in case she has made her way back there.

"So far we have received a number of unconfirmed sightings and are following up information that has been provided to us.

"I also appeal directly to Sophie to make contact with either her family and friends or police to let us know that she is safe."

Anyone with information is asked to contact 101.