A total of five people are in custody on suspicion of child abduction, South Yorkshire Police said, after teenager Erika Kacicova, who had been missing for six days, was found.
The police said they were four men and a women.
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The Duke and Duchess of Cambridge met young people who have battled mental health issues on Saturday.
Former Chancellor Lord Geoffrey Howe was Margaret Thatcher's longest-serving Cabinet minister, also taking on the role of Foreign Secretary.
Lord Geoffrey Howe is known by many for his resignation speech which was seen as the catalyst which destroyed Margaret Thatcher.