Police say they are searching for Natasha Salter, who is missing from St Leonards-on-Sea.
According to Sussex Police, the 19-year-old was last seen at her address in the town at about 8pm on Thursday, October 5.
Police believed she could be in the Hastings, Brighton, Bexhill or Horsham areas, or in Maidstone in Kent or in London.
She is described by police as white, about 5ft 2in, of stocky build, with shoulder length red hair and blue eyes.
She also wears black rimmed glasses and has three earrings in each ear, and could be in possession of a purple backpack.
Anyone with any information about her whereabouts is asked to report it online or call 101, quoting serial 1365 of 05/10.
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