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North Korea TV announces execution of Chang Song-thaek

13 December 2013 Last updated at 10:01 GMT

North Korea has executed Chang Song-thaek, the once-powerful uncle of the country's leader Kim Jong-Un.

State media said he had been executed after being purged for acts of treachery, and described him as a "wicked political careerist, trickster and traitor".

The White House said it was another example of the regime's extreme brutality.