The US defense secretary, Ash Carter, has warned that any attack on American allies or use of nuclear weapons by North Korea would be met with an “overwhelming” US response.

He was speaking at the start of talks between the top US and South Korean diplomats and defense officials to discuss their response to the growing threat from North Korea’s nuclear and missile programs.

The meeting comes weeks after the North’s most powerful nuclear test explosion to date, and days after its failed test launch of a ballistic missile.

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The guy above me though..... Over to the 1bellow