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Alanta not seen since Saturday night.
Alanta Goodwin was last seen by her mum at around 11.45pm when her daughter left their home in Derby.
Alanta is of mixed race, around 5ft 4in tall with long, straight red hair. When she went missing she was wearing a grey top with flowers on it, beige leggings and a black cardigan.
Police in Derby are working with forces in Nottingham and Birmingham where Alanta has friends and is known to have visited.
Anyone with information should call police on 0345 123 3333.