North Korea Flag (Photo: Wiki Commons)

South Korean officials have arrested a North Korean defector on suspicion of plotting to kill high-profile activist Park Sang-hak, reports from Seoul say. Park is an anti-Pyongyang activist involved in sending propaganda leaflets to the North. The detained man is said to have had a poison-tipped needle on him when he was arrested. Lisa Mullins gets details from Jason Strother in Seoul.

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