Sculptor Anish Kapoor has described the detention of Ai Weiwei as "barbaric" and is dedicating a new monumental art installation in Paris to the Chinese artist, who is known to be held by Chinese authorities on charges of economic crimes.

Speaking to Today presenter Justin Webb he said the art would should do more to campaign for his release, and described the fact that he had not been able to defend himself against the allegations as "ridiculous".

"This takes us back to a Soviet style time when the voice of artists... were seen as being dangerous," he said.

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