CCTV9英语新闻：DPRK claims to have miniaturized nuclear warheads（在线收听）

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North Korean leader Kim Jong-Un is being quoted saying his country’s military scientists have successfully miniaturized a thermo-nuclear warhead. Kim reportedly made the comments as part of a meeting with his nuclear development staff.

His comments come a day after the North threatened pre-emptive nuclear attacks on South Korea and the U.S. mainland.

The threats come as U.S. and South Korean forces get large-scale joint military exercises underway this week.

Military tensions have surged on the Korean peninsula since the North’s nuclear test and rocket launch earlier this year, which has prompted new sanctions from the U.N. Security Council.