Photo, May 30, 2013, Kayla Mueller is shown after speaking to a group in Prescott, Ariz
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Islamic State: 'Coalition air strike kills US hostage'

The extremist group Islamic State is claiming that a female American hostage they were holding has been killed in a coalition air strike in Syria.

Images, which the BBC cannot confirm are authentic, have been posted online of what is purported to show the site of the strike in the city of Raqqa, an IS stronghold.

The hostage has been named as Kayla Jean Mueller.

Jon Sopel reports.

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