Update: Tiree Bracher has now been found.
A spokesperson from Wiltshire Police said: "Thank you to everyone who shared our earlier appeal regarding missing teenager Tiree from Swindon.
"We are pleased to confirm she has been found safe and well."
A vulnerable 16-year-old from Old Town has gone missing and police are asking for help to find her.
But if they see her they shouldn't approach because she is likely to be frightened by it.
Tiree Bracher is described as slim, with long blonde hair worn in a ponytail. She is believed to be wearing blue-rimmed glasses, black leggings, an electric blue fleece and a pink T-shirt underneath.
Police are concerned about her welfare and are encouraging anyone who might have seen her, or who knows where she is, to get in touch.
But they are asking people not to approach her as it could frighten or upset her.
Anyone who can help should call 101, unless it is an emergency, in which case call 999.
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