A man is being held in connection with the shootings earlier this week in Paris, it has been reported.
The man was arrested around 7pm local time in an underground car park in a western suburb of the city.
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Denise Fergus, James's mother, described herself as "disgusted" with the decision to nominate "Detainment" in the Short Film category.
The broadcaster was interviewed by the Duke of Cambridge on the importance of the natural world.
The headquarter switch from Malmesbury, Wiltshire, is likely to prove controversial.