Swedish artist Lars Vilks has joined a Facebook group entitled Kill Lars Vilks in order to engage in discussion with his antagonists as part of his ongoing art project to explore the bounds of free speech.

"I have joined the group Kill Lars Vilks," the artist confirmed.

Vilks' notorious sketch of the Muslim prophet Muhammad as a dog was published in 2007, and since then he has lived in threat for his life. He was recently attacked at a lecture in Uppsala and his home was targeted in an arson attack.

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