This story has now been updated. Sienna has been found.

POLICE are 'growing increasingly concerned' over a missing 13-year-old girl from Wingrave, near Aylesbury.

Sienna was last seen in Wingrave on Wednesday (August 29) at about 12pm.

She has been described as a 'mixed race girl with short curly hair and brown eyes' and was last seen wearing a Nike Tech black fleece.

Sienna is also known to frequent the London area, specifically Uxbridge and the vicinity of Heathrow Airport, and is known to use trains.

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Inspector Simon Lincoln, based at Aylesbury police station, said: “We’re growing increasingly concerned for the welfare of Cienna, who hasn’t been seen since Tuesday.

“I am appealing to anybody who knows of her whereabouts to please report this to us via our dedicated missing persons’ portal, quoting reference 43230387581.

“If you see her, please contact the force on 999.”