Related Story on Carbonated TV: North Korea Army: 'War Could Break Out Today'
The Foreign Secretary said the world is right to be "worried" about the threats of violence from North Korea, but should not "miscalculate" the response.
Speaking on the BBC's Andrew Marr Show, he said: "It is developing nuclear weapons, missile technology, long-range missile technology. It’s also engaged in the proliferation of those items whenever it can to other countries in the world, and other items of military hardware as well.
Read it on Telegraph