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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Police are trying to find the driver of the car following the incident in Kingfisher Close, Brownhills.
An unnamed man died at the scene, while a woman was pronounced dead after being taken to St George's Hospital, Tooting, south-west London.
Eastern areas will see a few showers coming in on the northeasterly breeze