Update: Naomi Chambers has been found by police.
Nottinghamshire Police have thanked the public for sharing the appeal.
Police are urging the public to call 999 if they see a missing 12-year-old girl.
Naomi Chambers was last seen around the Queen's Medical Centre on Saturday (September 14) at 1.30pm.
She is originally from the Gamston area.
She is described as 5ft 4ins with brown hair. She is wearing a shell bracelet on her right wrist, a grey hoody and grey leggings.
A police spokeswoman said: "Please ring 999 state incident number 413-14092019."
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