Rescue services said they are investigating a suspected "hazardous materials incident" at a shopping centre in Hampshire.
The Hedge End retail centre was evacuated after the alarm was raised at about 5pm today.
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A 35-year-old and a 27-year-old man, both from the Birmingham area, have been arrested and remain in police custody.
Molly Owens, was reported missing on Friday and is believed to be with her father, who is wanted after failing to appear in court.
Former Diversity dancer Robert Anker has died in a car crash in Canada.