Police are appealing for information after a 14-year-old girl from Bicester went missing on Monday.
Antigone Buck, known as Tiggie, was last seen leaving Meadowbrook College in Marston, Oxford, at about 4pm.
She is described as slim, 5ft 7ins tall, with long dark hair. She was wearing a grey hooded top, a red padded jacket, blue jeans with holes in them and black shoes.
Sgt Philippa Payne said: “We are growing increasingly concerned for Tiggie’s welfare as she is not believed to have any money on her and the spate of cold weather in particular is causing us some concern.
“She has several friends and previous connections to Wantage and is believed to be in that area. I would urge anyone who has seen her or knows of her whereabouts to contact us.
“I would also like to let Tiggie know that she is not in any trouble, we are just worried about her and need to make sure she is OK.”
Anyone with any information should contact Sgt Payne via the 24-hour Police Enquiry Centre on 101.